Does Udmurtia have any autonomy
Udmurtia is a republic, which is highest level administrative division possible in Russia (there are only 21 republics). However, Udmurtia is 70% Russian by ethnicity. The remaining 30% of Udmurts also look super Russian, except they have a high frequency of red hair. Attaching photos of Udmurts below.
does Poland maintain any trade contacts with Udmurtia
Yes, I'm sure. Even after Feb. 24th 2022.
and does it have to pay in rubles?
Not necessarily. Food, cosmetics, medicines, etc are not sanctioned (unless company is self sanctioning).