Levels adjustment layer

[andrewn2016]

There are no adjustment sliders beneath the levels histogram in the Beta, making it impossible to set black or white points.

[CShubert]

Hi @andrewn2016 testing here and they show as expected.

Try resetting Prefs for the Beta:

/Users/yourname/Library/Preferences/ Photoshop Beta Settings (Mac Ventura)

/Users/yourname/Library/Preferences/Adobe\ Photoshop\ \(Beta\)\ Settings (Mac)
C:\Users\user name\AppData\Roaming\Adobe\Adobe Photoshop (Beta)\Adobe Photoshop (Beta) Settings )Win)

Launch BETA Photoshop While Pressing The Keyboard Shortcut

With Photoshop closed, press and hold Shift+Ctrl+Alt (Win) / Shift+Command+Option (Mac) on your keyboard and then Launch Photoshop the way you normally would.

https://helpx.adobe.com/photoshop/using/preferences.html#Manually