How come I can't find the new Beta i CC?

Logout from the Creative Dektop Client and relogin with the Adobe ID that you've used for the subscription.

If this doesn't help try to uninstall and reinstall Photoshop Beta by using the CC Desktop Client.

If this failed reset the Creative Cloud desktop app. Make sure it's in the foreground, then press:

• Win: Ctrl + Alt + R
• Mac: Cmd + Opt + R

If this doesn't help, try to repair the client: https://helpx.adobe.com/download-install/kb/creative-cloud-install-stuck.html
If this also doesn't help go uninstall/reinstall decribed in the link above.