@SL1234 , as I mentioned in an earlier response, I have verified that the issue exists for both tax year 2022 and 2023 -- I did not check for earlier years. This seems to be more of a policy decision to not allow e-file if an unsupported form is referred and not called for. And yes it would be good to allow this i.e. the recognition that un-supported (but required) form is being referenced.
