Rails 7 installation does not work because of dependencies

[gobijan]

Did you find a bug?

Rails 7 alpha 2 is out but is already very usable and will be finally released in less than two months.
Are there any ongoing efforts to support Rails 7?
I forked and messed a little around with dependencies but one thing leads to the other when it comes to allowing more and more dependencies.

Expected behavior

Active Admin should be usable in Rails 7.

Actual behavior

Active Admin won't install because of unmet dependencies (railties as a starting point).

How to reproduce

Just try to bundle activeadmin into a rails 7 app.

[javierjulio]

Closing in favor of #7196 where we have a details on different dependencies that will need to be updated to allow Rails 7. Some we own, some we don't.