@Olivia she's been doing it after a bottle so wouldn't say she was hungry necessarily, its just really odd 😅
Boob is also for comfort as well as food so could be looking for comfort? No harm in letting her suckle if she wanted to, if you feel comfortable with it and might enjoy it. It’s also possible to relactate though it can take a lot of effort and perseverance.
I think it’s probably instinct, bottle fed or breastfed they still do the rooting thing when they’re hungry