After reading https://github.com/groeck/it87/issues/11 I was able get my Ryzen CPU temperatures and FAN speeds on Asus B350m board.
I am running this set of commands to get sensor output:
isaset 0x295 0x296 0x06 0x80
sensors-detect --auto
modprobe it87 force_id=0x8620
sensors
isaset command is very important here. I wasn't able to get sensor output without running it.
Voltages needs scaling, but I believe CPU temperatures and FAN speeds are correct.