There's a button in Recovery Options (System > Recovery) that is something like "Roll back update".
It's available once you're on the 24H2 while it's still considered a preview. I just got 24H2 forced down my throat and it broke several things - spent about an hour researching and decided to just system restore. Went looking for the Win11 option to do it and found this new one.
It should be in System > Recovery and under "Recovery options" there is a button that will appear that says "roll back update", with a subtext of "roll back preview and go back to previous windows image"
It's where my crudely drawn arrow is pointing - I just rolled back so the option is gone for me, since 23H2 is the last stable release.
