So my pretty bad workaround now is Mulch + Vanadium.
Mulch will be for apps without the VPN, Vanadium for the rest. But the strange "lost webapps" bug makes me use it the other way around currently.
Mulch doesnt use the Trichrome library so it is 380MB. A tiny browser like Vanadium would be enough, using the Trichrome library. But I think there is none?
Mulch even has a JIT toggle, seems to be integrating a lot from Vanadium.
I am getting theatest version through Obtainium from the DivestOS F-Droid repo.