I feel so strongly about this topic that I recorded a podcast episode on it with my at the time business partner[1]. I think that maybe the only relevant reason to have a synchronous standup is to align on the biggest problem to solve in the next workday.

A standup of this model goes something like this: what is the goal for the day? What support is needed to make it happen? etc.

[1]: https://podcasts.apple.com/us/podcast/better-stand-ups/id163... -- skip to about 10:00 to hear the above.