Junior on a fully distributed team across time zones, how do you not feel invisible?

My team is spread across three continents and I'm the newest and most junior. By the time I hit a blocker, the person who can unblock me is asleep, so I lose half a day, and I worry that all this async silence makes me look slow or disengaged.

People who thrive on distributed teams: what actually works? Better-written questions so someone can answer overnight? Deliberately overlapping my hours? Recording short Looms? I really don't want to be the junior who quietly falls behind because I couldn't figure out the async part.