AWS released pg_tle (Trusted Language Extensions for PostgreSQL) late last year, and supabase has just launched a package manager for these extensions dbdev. plv8ify looks really well placed for being a tool to package TS code as a pg_tle extension.

There is an example of a plv8 based extension here: https://github.com/aws/pg_tle/blob/main/docs/07_plv8_examples.md#example-distance-functions

More or less it's a case of bundling the function definitions into a combined pgtle.available_extensions()