Not sure if there's a reason why the structure guide lines don't work for the php code, would be nice if they did. 😀
Structure guideline should be there; do you have a screenshot of how it looks in your case? It is possible it has to be enabled in Tools/Options first.
It works in my js files but not php... and that's in VS 2019 and 2022
I see! thank you, we'll take a look on that.
the feature will be added in the next update!