Does Bumble automatically change your profile picture?

After you complete the linking process, Bumble automatically uploads the 24 most recent photos from your Instagram profile.

Can people tell when you look at their profile on Bumble?

Literally, the answer has to be no unfortunately. Bumble officially doesnt allow such things. It used to allow users to see when someone you have matched used the app for the last time.

Can someone tell if youre on Bumble?

Unfortunately, no, Bumble doesnt show when a user is online or when they were last online. Its for a good reason though – tracking when users were online was reportedly used by stalkers when it was available.