As you well know,
- android 12 (if exist) is needed for /e/OS-S
- android 11 (if exist) is needed for /e/OS-R
In principe /e/OS-R don’t work over android 12…
On most device (when android 12 don’t exist), /e/OS-S work over android 11 or 10 or 9 (if latest available)
So using easy-installer, you must downgrade to android 11 to install /e/OS -R
For Your Information, guacamole is on the first list for /e/OS-T (android 13 based) [LIST] Devices which will be getting upgraded to /e/OS T - Part I
Edit : /e/OS-T is out for month https://images.ecloud.global/dev/guacamole/