I think some old boards do not update even there is update on m$ server because update is intended to specific boards as per their discrimination. But in general realtek audio oem drivers are mostly compatible with all boards with few exceptions. As we see most manufacturers update drivers for a specific board for 4 years and stop later. Drivers for latest boards still compatible for old mobos those are ignored to update.
for 6.0.9785.1, yes indeed though you did not test nor report about the 6.0.9780.1 version reason why the 9785.1 Asrock-Intel-White-RTK is planned around mid-Feburary {recently "postponed" until further notice as of 2/13/2025} is because of the "White" related INF files (hdxsstwhite.inf, hdxwhite.inf & HDX_WhiteExt_RTK.inf); they're a real PITA ("pain in the a**") to edit/mod {and those "edited/modded" white inf files mostly get rejected by DriverStore Explorer with an error message} because Realtek usually seems to add new IDs and/or remove some existing ones in those white***.inf files in each new version; unofficial Asrock-Intel-White-RTK releases will mostly be lagging behind the Biostar & Gigabyte releases. so no 6.0.9785.1 Asrock-Intel-White-RTK driver will be released in the middle of February; it could happen maybe around late or near end of February. edit evening 2/3 - btw, I did receive the replacement PSU for my custom built PC earlier today; I'll catch up in testing both the 6.0.9780.1 & 6.0.9785.1 Gigabyte releases edit 2nd time evening 2/13 - edited note about an upcoming 9785.1 Asrock-Intel-White-RTK release, which is postponed until further notice
When you post 2 versions simultaneously, automatically I choose bigger number version to install. And then I set my 5.1 room correction settings, eq settings and others and start testing it by playing number of my classical music videos and movie songs until I feel satisfied. After that I forget that you posted another version too. Because re-installing another version again need to do all these things like cut off net, install and restart pc twice, test all my favorite music. It takes more than one hour for that. Sometimes I keep listening for hours if satisfied too much. I loose myself in that. I have my own world of music.