I had a similar experience on Triplebyte and it turned out to just be terrible UX. When you first booked the interview, it would give you a phone number to cal

I had a similar experience on Triplebyte and it turned out to just be terrible UX. When you first booked the interview, it would give you a phone number to call. Later on, the company could add Zoom details. That would get stuck in some sub-section of Triplebyte UI. So if, like me, you didn’t go check their website at the moment of the interview, you would call a number and nobody answers and you think you got ghosted - and the company also thought they got ghosted. It happened 3 interviews in a row until I figured out what was going on.