Updating this tread as it was referenced in an email.
We have tested and continue to test ELK-RP2 version 2.0.40 with Windows 11. We have not encountered any issues.
Here is the version of Win 11 we utilize for testing.
Edition Windows 11 Pro
Installed on 1/28/2022
OS build 22000.978
Experience Windows Feature Experience Pack 1000.22000.978.0
Although we are not able to verify all builds of windows or specific configurations, we can state that we see no issues or incompatibilities with utilizing Windows 11.