For my autobio comic, I do usually 4-6 panels per comic.
Story comics? For Street Magic, I used to do pages with 5-7 panels per page, one page per update... Ch2 was 17 pages, for example.. 135 panels for the whole chapter. I divided that into four parts when I cross-posted it to webtoons.
Since I switched to the vertical format and started following suggestions from tapas and webtoon guides.. I end up publishing anywhere from 55-80 panels per episode for LWAM I'd love to cut it down, but seeing as my story works 1 day = 1 episode, I have a lot to squeeze in in just a couple conversations between characters... So I've started also including chatlogs at the end! But that comes with the risk of being compared to other comics with chatlogs, if you get what I'm saying