Here are the official iodé build instructions (basically lightly modified LineageOS instructions): os / public / manifests / android · GitLab
@petefoth and I build using the LineageOS for microG docker environment: Home · lineageos4microg/docker-lineage-cicd Wiki · GitHub
You can also make a request here: Request unofficial builds for unsupported devices but the sources for the unofficial LineageOS build you found are a key requirement,
There is also of course the GSI image you could use.
Full disclosure: until now I have not personally made builds for any devices besides those officially supported by LineageOS (but not officially supported by Lineage), so others will probably need to give a bit more guidance.