Supabase.com is a backend as a service platform. By default, it provides Postgres as a backend, but there is a wrapper mechanism that allows to add different data vendors.
https://supabase.com/blog/postgres-foreign-data-wrappers-with-wasm
https://github.com/supabase-community/postgres-wasm-fdw
it'd be great to introduce IRIS support there. Currently there is MS SQL, Snowflake, Databricks, etc...
Thank you for submitting the idea. The status has been changed to "Community Opportunity".
Stay tuned!