I live in Russia and I have vps with wireguard vpn in Netherlands. At the current moment it works for me pretty well except the some connection failures two days ago. But they were very short. But I don't know how long my vps will be accessible with these fucking blocking.
Can you confirm that it is still working fine on normal home internet but not on cellular data? Have been back to Russia multiple times per year (family reasons) and none vpn ever works on cellular network. Some work at home and places.
My own vpn is to my house in different country. Wireguard. That has always been working over home wifi here (not cellular). Even until now.
For now it works both via mobile data and home provider. My mobile operator is Tinkoff. The home Internet provider - City Telekom. But sometimes it losses connection for several minutes. But generally it works well.