I've the following information for you guys:
If you are an Insider in the Dev channel, you can now leave this channel without reinstalling. Microsoft has now made it possible, since the version number (finally) in the Dev and Beta are identical.
So you can now go to Settings -> Windows Update -> Windows Insider Program and pop up the setting "Choose your insider setting" and switch directly to the beta channel. How long it will stay like this is uncertain. Because soon Microsoft should start with 221xx in the dev channel. And that could happen as early as 11.08. Then a change is no longer possible. So don't wait too long.
A direct exit from the Insider program from the Dev channel is not possible without a reinstallation. You have to switch to the beta channel first.
In the beta channel, as well as without being an insider, the further updates for Windows 11 are now distributed automatically. The only difference at the moment is that the non-insiders do not get all the features, for example, the widgets activated. But it won't be long until October, when Windows 11 will be officially distributed to everyone.