Personal experience with Jolla:
I bought their first mobile (still have it somewhere) that would be a "Linux Phone that run android app".
Wanted to support it and was ready to expect some bugs but it did not work all.
No support at all, most of android app did not work. The OS was not finished that it was already obsolete. And now there are doing it again like the first one never existed.
I have zero trust in this company
Curious choice of backend python. Indeed Flask is a famous python framework but it seems it has been completely overshadowed by FastAPI.
I would suggest "HyperFastAPI"