This isn't all young people. Or else no one would be going on trips or pursuing big career ambitions. However, yes, I do agree that there has been a huge impact on current teens and young adults of Covid lockdowns and screen use.
I have teenage children and stepchild. I know lots of other teens and young people through their friends and peers. There are still plenty going to Uni or pursuing careers in things like medicine and aeronautical engineering, there are still plenty planning and completing international travel, interrailing, gap years in the southern hemisphere etc.
But there are also some who dropped out of college courses because it wasn't given them exactly what they want, who are choosing to stay at home instead of moving away because of financial worries, who struggle more socially after their confidence took a battering in the years when they should have been exploring their independence.
It's a balance as a parent to support them to make choices and decisions that they're most comfortable with but that also serve the future they want to have for themselves. If they want to quit the college course, OK we have a proper conversation that looks at the reasons so we can better understand what lessons can be learned when looking at what comes next instead. It's in saying that we support and love them but they have to be doing something.
On weekends and holidays of course they're allowed lie ins and down time but not all day every day. There has to be some paid work, some physical activity (gym, training, walking, sports, swimming, whatever), and engaging with other people! Some teens are just less social and more anxious than others.
It's tricky when you can see that doors are closing and know as an adult that some opportunities won't come around again or will be harder and more expensive as an adult but as long as you're talking about it with them. My middle one would be far too nervous to do a gap year travel trip but he's keen to pursue a career that means he could work abroad so he still has that routine and framework of a job while experiencing another culture. The one who chose not to do A levels or uni is starting to see her friends moving on in life in different ways to her and although she's got more money and independence than them as she works, that's what's got her brain moving and thinking about what training she needs to do through work to open doors and move along in life.
So that's a really long way of saying it's not all of them, I think it's increased, but also it doesn't mean they can't travel in their 20s or resit GCSEs in their 30s or find a hobby or passion they love in their 40s.