Does she know how worried you are? If not, try to explain in a way that let’s her feel compassion towards you and not feel blamed/attacked/claustrophobic. At least then she might regularly let you know that she’s still safe. Do you or her know anyone else in Russia who can be there for her if she needs any help?
I agree. For the spec though, Dell aren’t any better value for money than laptops from the smaller ‘for linux’ sellers. Which is pretty cool. Of course it’s much easier to find used Dell laptops though.
I think it depends on your budget and where you live. North America has System76, UK has Starlabs, Germany has Tuxedo, Netherlands has laptopswithlinux and Spain has Slimbook. I think Starlabs are the only ones who do a tablet. Has your wife tried using an external graphics tablet? I don’t use Krita myself but if you want to save money and buy a second hand convertible it might be worth asking/searching on a Krita forum about what others are using from the bigger manufacturers.
I agree that the internet might not be the best place to share your fears. At the same time though Russia is a country at war and doesn’t seem to be very friendly to foreigners at the moment. I’m not sure if that suggests a deeper issue than a caring parent being understandably worried about their daughter.