Incidentally the only Bubble app I've seen online was mentioned in the Bubble FB ad: Revetize. It actually made me do some research when I saw the ad last week as it seemed so absurd.

https://nocodefounders.com/interview/revetize-interview

0 results on the Apple app store, but there is an app on the Play store called Revetize with "10+ downloads". Perhaps that's it?

app.konstructly.com (2 sided marketplace. Internal profile and dashboard. In app messaging. Job posting and hiring)

https://www.divertsessions.com/pages/challenges-app (Instagram for action sports. App in app store is bubble by us)

Lots of business tooling ones that are a bit more sensitive. Booking systems for SMEs.