Branch configs mapped to specific Vercel deployment

Hi! I have Doppler and Vercel connected and the syncing is working well for development, preview and production. But we will often want to push a branch with a couple of environment variable overrides. What’s the easiest way to do this with Doppler and Vercel?

What I’d like to do is create a Doppler branch config and have that config sync to a specific branch deployment in Vercel. I don’t see any way to do this in Doppler. I know that Doppler is limited by Vercel’s exposed environments (development, preview, production) but Vercel does provide a way to override preview environment variables: Environment Variables – Vercel Docs.

Right now I have to go in and manually create overrides in Vercel and this dampens the benefit of Doppler branch configs.

Is something like this possible?