Hello @tsdadam
Thank you for the site info, I try to replicate your site by adding same plugins and themes you have to reproduce the issue, the issue may be with one of the plugin changing rest route of your site.
Sadly I was not able to reproduce the issue, can you following
Please try re-saving your sites permalinks by visiting
Dashboard -> Settings -> Permalinks -> click “Save”
Additionally self diagnose using the Health and troubleshooting plugin
To narrow down further, could you use the Health Check & Troubleshooting plugin and enable its troubleshooting mode. This mode disables active plugins and switches to a default theme safely since it only affects the experience of the logged-in user.
– Please enable the AMP plugin and let me know if the issue is present.
– Enabling plugins and your theme one by one in this mode may help pinpoint if something else is involved.
– Note you can disable troubleshooting mode from the plugins page.
Hope this helps!