Mine are 8 nearly 9, 12 and 14 nearly 15 and pretty easy aside from the youngest's school work.
We're abroad and had 3 weeks of term time school closure but today is the first day of our holiday lockdown. School children here are expected to get through a serious amount (6 scheduled lessons of 50 minutes each plus an hour's homework daily, sent by email no online lessons) of full on very much compulsory set school work and have been told in no uncertain terms that nothing will be repeated and parents who don't ensure their children complete the set work will be disadvantaging their children. This has unapologetically included new content.
That has been hardest with the 8 year old by several miles.
They're all getting on fine though, pretty much no arguing. We're lucky to have a reasonably big (4 bedroom semi) house and a small garden and to be a few meters from a massive forest where we see maybe 3 or 4 people if we spend a couple of hours there. They're fairly young for their ages in some ways and have been lovely company.
I've also been working healthcare shifts so get to leave the house without them which helps.
The teens socialise online in their allocated screen time (DD watches films online with her friends and chats during them, ds1 games online and uses discord to chat) they've really adapted well. Dc1 misses school but dc2 isn't bothered.
If I wasn't utterly failing to do my own college work it'd all be fine tbh. That's stressing me out. I can't do it though, partly due to constant interruptions and dc3 needing my focus with his school work and party due to being tired from work and the kids being clingier than normal and emotionally blackmailing me a bit for going to work, so I feel they need me when I'm home...