A lot depends on what else is in your system. Look at the TDP of the GPU itself. The CPU, and whatever else you have. Those recommendations have to take into account that you may have a 150W CPU, HDD RAID array, several big cooling fans etc. That may not apply to you at all.
What 360W PSU do you have, and what are your system specs?
Ryzen 5 2600 seems to be a 65W CPU
These guys show 120W GPU and suggest a 350W PSU. Looks about right to me.
https://www.techpowerup.com/gpu-specs/radeon-rx-570.c2939