if it is proprietary and it’s one of the ones listed above - if the motherboard has UEFI/BIOS mode you can enter and see if there isn’t anything in there that would allow you to control your fans from directly inside.
like i said GNU/Linux distros do some things very good while some other things are left to be accesed in other ways. windows apps provided by those same companies that sell the proprietary motherboards directly acces the UEFI/BIOS features that are present in the firmware they don’t magically enable fan configuration and curves if those features are not in place allready. that’s why they say proprietary modern UEFI/BIOSES are GUI OSes in their own right. they offer some convenient features but take away your freedom in return ( which is more valuable than convenience )