That's pretty crappy of Gigabyte if Rev. 1.4 and lower will only ever support Ryzen 7000 series CPUs only. Who will ever early adopt Gigabyte motherboards in the future now, if they keep messing around with different revisions every so many months, only for the earlier revisions not to be compatible with newer release CPUs?
I noticed the Gigabyte B650E AORUS MASTER, which came out at the same time as the rev. 1.0 B650 does have support for the 9000 series CPUs.
Edit: Just to add, 1.2.0.0a Patch A, is supposed to give support for Ryzen 9000 CPUs, so who knows, maybe the website pages will update in due course . . . ?