TWIST! Following some other leads I installed MSI dragon center to find out if i could force the fan higher in software and it thinks that 2000 RPM is the max speed for the fan!!!
https://i.imgur.com/JwBITH0.png
Did AMD ship me a Ryzen 2600 fan for my 3600? Because my other Ryzen 3600 goes higher than 2000 RPM. (I read that the 2600 had a 2000 RPM fan). Or maybe it's that MSI's b450 tomahawk (non-max, latest bios) bios has an error in it.