Remote is hard to make work with juniors, unfortunately.
Tell me about it. I don't mind helping someone, but when they don't pay attention the first time and I have to have the same exact meeting again, it's kind of a bother.
We've had some success with recording meetings and using automated transcriptions, though we don't have any fresh out of college juniors now.
My current place does that, but we still don't really hire juniors so who knows if it works.
It was pretty shitty in the late 2000s/early 2010s IIRC.