While I agree that a daily standup would help with this, I feel like there’s other avenues to approach this problem. If their task is to do A -> C, give them some deadlines and if they don’t meet them then become more involved. Have them check in with a senior on the problem. No need to drag the entire team into a standup because the juniors can’t figure it out. You can also try to build a culture of asking for help, which is difficult to do. People either think they can figure it out eventually, or they’re just slacking.
While I agree that a daily standup would help with this, I feel like there’s other avenues to approach this problem. If their task is to do A -> C, give them some deadlines and if they don’t meet them then become more involved. Have them check in with a senior on the problem. No need to drag the entire team into a standup because the juniors can’t figure it out. You can also try to build a culture of asking for help, which is difficult to do. People either think they can figure it out eventually, or they’re just slacking.