I don't think it's going to be a generation. It's still a fairly small minority who home educate, and within that a minority that any of us are going to see making poorly written requests for help -- much like the poorly written requests in any school's parenting group isn't representative of all parents at that school or the posts in the relationship forums on here. People don't tend to post when things are going well, and those who struggle and have someone involved not up to the task are more likely have things not going well.
I've been home educating for well over a decade, and while there is an influx, that has always happened. While there were those who came for advice during lockdown homeschooling (not all home education groups welcomed them), those that have remained don't seem that different to the influx we get every year.
Every autumn there is an influx of those who have had issues with the school or LA, hoped the new year would fix things and it didn't, who want advice. Some want more handholding than others. We're now in the winter "I have a Y11 child, how do I handle exams?" (which this year makes a bit more sense after the mess that happened with many home educated teens this last summer and so many places that people previously knew about either not doing private candidates this year or have not yet responded to whether they're doing them). Next spring, we'll get those with KS3 age children who want help prepping for KS4 and in summer, there will be those unsure about their kids returning in the autumn who want to talk about it (a few of those will show up in the autumn again). Many of those who were once needing a lot of handholding have been through a lot and end up catching up quick, some who didn't want much come back later in disaster.
Within that we'll have the blips of those who want other people to organizing their child's socializing (with those trying to organize things for their teenagers, but then never show up for anything being a particular pain) and discussing political issues. Depending on the group, it will swing from those who think the government has absolutely no place being involved raging about the latest consultation (which we've had practically every few years for as long as I've been involved and nothing has changed) to those who think we should be getting money for everything and want us included in the rest of the system for extracurriculars and everything without any demands placed on us. Most I think are in the middle (funding access for qualifications for teenagers and LAs being required to have places for external examinations, the ability to register within the same system that people register for schools so we don't get the issue of our children being automatically registered at a school and then the back and forth that comes with not taking up a place - it took me months to get my DD1 unregistered from a school I never applied for in the first place, including have truant officers at my door. It seems daft I can't just use same system to select we're choosing home education at primary and then again at secondary like others pick their school choices).
In the UK, most home educated children are those withdrawn from schools after issues or otherwise had issues with their local authority in getting an appropriate place that meets their needs. Home educators who do it from the start, who choose it because we think we can, are a minority and discussions on it shouldn't really focus on us. It's part of why some of us have argued that in school stats, number of pupils who've left should be a stat parents can see. Obviously, there will always be those that move, but if schools had to show how many left publically, they might do something if it gets suspisciously high. If LAs were judged by how much children's educations were disrupted by being moved around a lot, something might be done.
We can go on about the benefits of schools - I now have 2 full time in school, 1 full time at home, and 1 part time teenager myself - but many children aren't getting that within schools and parents are often just expected to suck it up when their child can't get a place or isn't getting an education. We can go on about the benefits and research in home education (though, as a self selecting group, that research will always have issues), but there are home educated children not getting those either and haven't ever been getting it well before Covid - this group isn't particularly daft in comparison to what I've seen before.
The issues isn't actually either type of education, it's that we have systems not entirely well functioning to support many of these children, most with far less choice in their education than common rhetoric suggests and a terrible system for education in adulthood. It's not losing an entire generation, but enough from all types of education who are being failed with all type of parents involved.
It's not the parents who clearly struggle that worry me really, it's the children of those who are very eloquent and easy to overlook, but are actually lying about their ability that concern me. I've been around the block enough times to know that no grammar checker is going to catch that some are very good at putting together an image - whether their child is in school, home or a mix - because keeping that image is important to them, but their child ends up really behind and unwell. I've seen that go on far more than a parent who struggles to teach English well. The latter are normally happy to use a curriculum, the former get really insulted if you suggest anything that might help when the cracks start to show.