Found this while searching - https://farside.link/redlib/r/roblox/comments/1qbxvf9/working/_on/_a/_roblox/_alternative/_its/_open/_source/
Edit: they have a CodeBerg (based on ForgeJoe) org, former link: https://github.com/orgs/OkutuProject/repositories
Is it open source if there’s no source yet 🤔