Source? From the latest report I’ve found I see 70% oppose the current regime.
https://gamaan.org/2025/08/20/analytical-report-on-iranians-...
The nuance here is that most Iranians favor regime change, but majority of them don't want it to come via US/Israel-led change.
This site also reported that the majority of Iranians are atheist. Its methods have been questioned before.