Yes, contacted Apple Support about this issue of the latest update to iOS18, which does not appear now. I had upgraded to 17.7 and was waiting for a week or more for any bug's to be fixed with like 18.1. However, it is not even offered now when checking software updates. Support was having me reset my Networking, even we I asked about a bug issue. It wasn't untill 40 minutes later they say another inquiry and had a return in which there was a problem with iOS18 and the latest iPads M4.
Now software can be touchy with so many different products that will use this iOS. However, it is somewhat a blackeye since it has 'bricked' several iPad Pro with M4 chip.
Just glad I waited to see how it all played out before attempting the new install.
I did update my iPhone 15 Pro Max to 17.7, however iOS 18 does show available for that device! I will wait for a few weeks longer and see when 18.1 is released and then give that some time as well just to play it safe.
Best to all!