Like n2n said, stage dooring is starting to come back right now. But I do think less people will do it now. And I'm not just talking about actors, but audience members too.
Before the pandemic, I was a pretty frequent stage door attendee. But over the past several months, since Broadway's return, I have greatly enjoyed not having to worry about booking it out of the theatre to get a good spot at the stage door. I never left during bows, but I was stressing during them, because of having to get a good spot. Since the reopening, though, I've been able to enjoy bows, stress-free, continue to take in the atmosphere of the theatre after the show at my own pace, and, when applicable, listen to the orchestra finish playing. It's been really nice to end my evening at the theatre with those things, rather than people stepping on my feet at the stage door. So personally, while I'm not ruling out ever stage dooring again, I'm not in a particular hurry for it to come back in full.
Like I said to someone in the city last month, I love the stage door, but I love the theatre so much more. That's what I've really embraced since the return of Broadway, and it's been wonderful.