I have a run (1.16.10+ SSG ).and he suddenly disappeared from the queue, and was not given a notification that he was rejected, was it because I sent it via Google Drive?

no

Then?

Next time upload from YouTube. I use that and it works for me

Sometimes when a run gets rejected or verified in doesnt show in my notifications so maybe look in the section of your profile where rejected runs are.

@Jux_LuxYT Thanks