Co-Authors Plus plugin is now compatible with AMPforWP. It does not require any 3rd party addons to enable it.
What features are compatible at the moment?
- Support multiple authors for an article in AMP.
- Support Co-author posts on the Archive page when the archives option is enabled in AMPforWP.
If there is any feature from the Co-Authors Plus plugin that is not available, then you can request it from this support page.