Ah, so they are refuelling Zvezda and Tiangong, but it doesn't count. I acknowledge that they aren't transferring cryo fuels. I just said they're regularly transferring prop.
Zvezda can orbit raise, btw.
https://www.russianspaceweb.com/iss_sm.html
two orbit-correction engines, KD, designated S5.79 with a thrust of 300 kilograms each and 32 small thrusters, DMT, designated 11D428A-10 and 11D428-14. They were developed at NIIMash and had a thrust of 12.5 kilograms each and designed to control the course, yaw and bank
Refuelling Tiangong's xenon hall effect thrusters probably doesn't count, so I guess I'll ignore it.