If you are having performance regressions in your project, file a bug report.
Otherwise it wont be fixed

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This and the other XR issues linked have been closed, while being reported by multiple people they aren't fixed.

Unity also moderates the comments to remove discussion these issues remain.

There is a new big performance issue on the issue tracker. URP team is already made aware and reproduced it themselves (not just QA)
https://issuetracker.unity3d.com/issues/urp-xr-performance-degradation-when-comparing-android-quest-2-builds-across-2020-dot-3-and-2023-dot-x

Here are some other smaller issues that are relevant to VR performance as well:
Input system optimizations performing worse in VR: https://issuetracker.unity3d.com/issues/input-system-enabling-both-optimization-options-of-input-system-reduces-performance-in-built-players
OculusXR performing worse than OpenXR: https://issuetracker.unity3d.com/issues/quest-2-oculusxr-has-worse-performance-than-openxr-when-built
Graphics Jobs not working on standalone VR: https://issuetracker.unity3d.com/issues/quest-2-build-crashes-on-quest-2-when-graphics-jobs-are-enabled

However, it is not uncommon for software updates to have varying levels of performance depending on the device being used. Sometimes updates can result in improvements in performance, but in other cases, there may be new features or changes that may negatively impact performance on certain devices.

I too am still attached to the 2019.4 LTS version.
In my tests any later version has lower performance.

It is not understandable or admissible that later versions of Unity have worse performance on the target platforms (Quest in this case, although they also occur in other areas) as this would be the main measure of Unity's improvement, which hurts the most developers and what makes it difficult for them to move to new versions of Unity and use the new features, and I think they are the main problem that Unity should address, above new features, and even bug fixes.

Bump.

New bug opened https://issuetracker.unity3d.com/issues/meta-quest-performance-loss-between-urp-versions-when-built

NOT FIXED. THE "DUPLICATE" IS ALSO NOT FIXED.

Tested this myself yesterday. The issue still persists!
Unity Editor and Builds are noticeably slower in 2022 & 2023.

not fixed...