Cache SSG helper response

I'm using createProxySSGHelpers in GSSP with ssr: false in the global config. I trying to cache a response of a public procedure called there, but I'm running into a dead end. I tried following the "App caching" example in the docs (https://trpc.io/docs/caching#app-caching), but the responseMeta option is unavailable if ssr: false. (At least TS tells me so) Is it somehow possible to still have the response cached?
Response Caching | tRPC
The below examples uses Vercel's edge caching to serve data to your users as fast as possible.