If you use a menu bar management utility app like Bartender, Ice, Hidden Bar, etc., turn it off and see if that corrects the issue. If so, and if you want to continue using such an app, then check with the developer for updates because the current version may be incompatible with macOS 27 Golden Gate
You do have several 3rd party Menu Bar items. Toggle them off then back on and see if that corrects the issue. Alternatively, press the Command key and click an item to drag it around in the menu bar. See of that corrects the issue.
If none of the above work, then have you rebooted your Mac? If not, that's the first step. If that does not help, then see if the problem is present when you boot in safe mode. That process performs some system cleanup and clears caches, and also disables 3rd party extensions that may cause problems.
Start up your Mac in safe mode - Apple Support
If that does not correct the issue, test in a new user account. A newly-created user account will have all settings at default, and if the issue does not occur in that new account then it provides guidance on what may need to be changed to correct the issue.
Add a user or group on Mac - Apple Support
Once the testing is complete, the new account can easily be deleted.
Delete a user or group on Mac – Apple Support
Those steps will help to isolate the problem.
Personally, I cannot replicate this issue on my Mac running 27.0.1.
Internal display:

External 5K display:
