Yeh... its definetly gone for me, I remember setting up my S24U and S9U in exactly the same way mirroring my prefered optimized settings for both devices. Im just gunna have to monitor battery drain and hope its no worse than before I guess...
Not to say you are wrong, but are you sure it was ever there? I haven't got a tab S9 series but I do have a Tab S8 Ultra on OneUI 6 and the option isn't there (nor has it ever been I think).
