December 1st is the latest security update, so those are fine. The november one I will assume is an A series, those are usually a little behind. The a7 lite, now that should still be getting software updates.
Some Samsung devices get monthly updates, some get quartly updates, some get them twice a year. Where a phone can have issues with updates if its in the wrong region, I don't believe tablets can. Go to software update on the tablet, press last update, press the link it shows. That is a website with all the updates for your tablet model. If the top update is the one you have (check android security patch month) then all is fine.
From the devices you said, app protection might not be available on some. I know american models don't have it but I'll assume your device is from this country. The s10 should have it though. Looks like this pic on my s22.
Is your vpn set for the uk? If not, that might be messing things up too