Hi @ibitscholar,
the short answer is: I want to, but struggle finding time and energy to do that. Eventually, there will probably be releases for multiple other versions.
We are currently discussing how to continue supporting other OpenFOAM versions than the latest ESI on Policy on support for OpenFOAM.org and other versions · Issue #328 · precice/openfoam-adapter · GitHub. The more reason there is to support a specific version, the higher the priority.