Is google having indexing problems again or what

My site has been live for a while, and indexing was stable until recently. Suddenly, my indexed pages dropped from 20,000 to just 9 when I checked using ‘site:URL.’ Google Search Console still shows 20,000+, so I don’t know what’s wrong. There are no warnings or violations listed, and I don’t see any quality issues with the content. Does anyone know why this might happen? Has anyone dealt with something similar?

One of my keywords dropped 11 positions today, and I thought it was just me.