It wasn't misinformation from me - the manufacturers are releasing final BIOSes at the end of this month to address boost speeds.
Quote from the link you sent - 'These improvements will be available in final BIOSes starting in about three weeks’ time.'
you havent been paying much attention nor read the post correctly. BIOS are already out. theyve been out. AMD doesnt determine when board partners will release beta or final bios based on their AGESA fixes. they come when they come and theyve already come. You just havent even looked.
No need to contact them. They are working on them from new to old. Every board vendor has had X570 bios out for over a week now. There are a few X470 available including a beta for yours (Crosshair VII coming first for ASUS). There is a test bios for B450 availiable for one ASUS Strix model, and they'll come as they finish them up. X570 was just a priority and X470 a secondary.
Finished initial ABBA bios for your board. ASUS are on top of it.