Browsable packages are now also implemented in upcoming previews of 2022.5 - when you enable the setting you’ll be able to browse into all nodes. Compared to 2021.4 any changes you make there will not get picked up. You’ll also not be able to see any values. A banner at the top of the patch will tell you if a patch is only browsable. On the upside browsing will be quick and have no unwanted side-effects on your running patch.
Should you for any reason need to edit the patches of a package you’ll find a new entry called “Editable packages” in the settings. Any package you set there will be excluded from pre-compilation and loaded from source (including all the packages which depend on it) after a restart. Once you’re satisfied with your changes to the package you can remove them from that list an things will be back to normal.