According to AMD, both the Radeon Pro 555 and 560 operate under a 35 watt TDP. In reality, the 555 may be slightly lower... but according to spec, TDP is 35 watts.
https://www.notebookcheck.net/AMD-Radeon-Pro-560-GPU-Benchmarks-and-Specs.226608.0.html
I have seen some other sites (like GPUBoss) quote TDPs that are MUCH higher, but this is in error. I am not sure where they are getting those numbers (perhaps from the Radeon RX 560?), but they are incorrect for the Radeon Pro mobile chips.