I figured it out. You need Photoshop (beta) 24.6 m.2181. Right now, Creative Cloud only pushes m.2174. You need to manually search for new updates to let Creative Cloud know you want to download m.2181.
Go to the Updates panel. In the top right corner you can check for updates manually. After that, you'll be able to update Photoshop (beta) to m.2181.
Or at least that is what worked for me.
Update
From what I understand you stillhave to trigger Creative Cloud to download the very latest version. So not just the latest version that is displayed within the beta section.
Update manually 1. OpenCreative Cloud
2. OpenBeta appswithin the left menu bar
3. Uninstall any previous installed beta versions ofPhotoshop (Beta)
4. Don't installPhotoshop (Beta)yet
5. Click onUpdateswithin the left menu bar
6. In the top right corner click on Check for updates(it will now find new versions of Photoshop Beta and Media Encoder Beta; or at least it does for me)
7. Install the now actuallatest version of Photoshop (Beta)
Check Photoshop (Beta) version 1. In the top menu, go toHelp, System info...
2. In the first line it will say Adobe Photoshop Version: 24.6.0 20230520.m.2181 (if it says m.2174, you don't have the latest version which is required to use Generative Fill)
@CShubert The tooltip does not explain why this feature is disabled. It simply says "Generative Fill is currently not available". This is happening to users regardless of their age, although it would be nice to know where age information is stored. Maybe that's the issue. Maybe some users are miscategorized as being under 18. I don't recall being asked to verify my age when I signed up for Creative Cloud. Where can users access this?