Sony a7R III or α9 for weddings?

Is there any wedding photographers here who use Sony a7R III or α9 for weddings? Any feedback? Is AF fast and accurate with NO native lenses? IS AF fast with Canon or Nikon lenses?

Thanks!

I use an a7riii for weddings. Previously had the a9, but the cropping power of 42mp is really useful for weddings.

A9 plays better with adapted glass though. I'd honestly take a hard look at the A7III, as it seems to inherit the a9 AF system.

Do you use Sony or Canon lenses?

A mix of both