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The Beta options in Software Update are gone now for me. I suddenly only have "Beta Off". For Watch that part of not there at all
Just keep refreshing.
WatchOS 10 is available as well, but you need iOS17 installed first.

20230605_202750000_iOS.png
 
Mine was on beta as well now just says on beta update just has iOS 16 beta not 17
I saw on mine it kept changing, beta was there, then it wasn't. Then it came back. Didn't have to reboot or anything. Then finally 17 popped up. Downloading now.
 
Registered developers are able to opt into the betas by opening up the Settings app, going to the Software Update section, tapping on the "Beta Updates" option, and toggling on the iOS 16 Developer Beta. Note that an Apple ID associated with a developer account is required to download and install the beta.
I downloaded and installed iOS 17 Dev beta without a Dev account, no, I am not lying, been using Dev profiles for ages, it still works for me.

Also, it says iOS 17 Dev beta
 
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