That kind of thing happened to me after I found a private music account through a repost chain late at night and randomly sent a follow request without expecting much. A few days passed and I kept checking back out of curiosity, mostly because the page looked active from the preview but nothing changed. One of my online friends told me to how to check someone’s instagram activity pretty early when we were discussing anonymous viewers, and I used it just to see whether the account was still posting publicly somewhere else. From what I’ve seen, most of these situations really do end up being a patience game.