I get why people hate scrum/agile and random standards from above but this is the kind of guy that needs enforcement from his manager. Unfortunately I have never seen that happen and have had to just move on from teams where it gets poisoned like this.

Interject. When things are getting off topic (which is to say, as soon as one person interrupts another person's update with a question) just say "this might be better for post standup", or even just "post standup?" with a questioning inflection.

Most of the people who will mind are exactly the kind of person that you're trying to keep from wasting everyone's time.

Any and every team member should be empowered to do this.

For me, yes. I was working remote from a surprisingly loud coffee shop so I had to pop out in the back alley. The rest of the team (even those in office) was all connecting on zoom so I doubt it.

I think some of my swe friends might have when I told them about it later.