If your team is waiting until the next stand-up to get help to get unstuck I think that's a cultural problem, they should be reaching out at any point during the day.
This is not something that make teams agile.
It's quite transparent and grating.
I recognize that often there is a good outcome and it helps. People can spin on issues poorly. (And I definitely am a person who from outside appearances sometimes resembles that, although usually it's me becoming the only expert we have in the domain & seeing how systems really work, not just closing the ticket asap.)
I wish we had async/offline systems to follow each others course & suggest some steering rather than being beholden to daily cross examinations where managers get to decide to redirect us off the path we've chosen.
No, stuck can often only be observed by looking in, the person or team may think they are doing useful stuff, but someone coming to it fresh can see that they have missed something obvious, hence why recreating the problem seems to be impossible, or why the fix seems very involved.
So a standup can allow you to see that someone is stuck, even when they don't realise it themselves.