Recurring Events module depends on Field Inheritance module.
Field Inheritance has recently released its 3.0.0 ver which will be compatible with Drupal ^10.3 || ^11.
In order to make this module compatible with D11, it has to depend on Field Inheritance 3.x branch.
This new Field Inheritance branch includes many architectural changes, and Recurring Events will need to adapt a bit its code to work seamlessly with this new version.
Active
3.0
Recurring Events (Main module)
I have checked this out locally and it seems to be working as expected for me. Nice work.