Not all OS's, unfortunately. I'm on the boat that says conforming to Gnome HIG's is a bad idea.
Just today I had the disk usage analyzer (baobab) open and I was navigating inside directories so I want to go up a directory and clicked on the "<-" left arrow in the headerbar, which went "back" a screen, discarding all the work done scanning the filesystem.
If this app had a traditional menubar and a toolbar this wouldn't have happened.
This is a common type of experience I have every time I use a Gnome app. It almost feels like someone deliberately researched how to make desktop apps as counter-intuitive as possible and implemented that as the policy for some reason.
To me Gnome mostly feels like someone deliberately researched how to make desktop apps as intuitive as possible and implemented that as the policy. And I guess that's what they did, and they did a good job.
omg yes, I felt crazy the first time I experienced this "feature"
I have the opposite experience. I have no trouble navigating Gnome apps, and now when selecting an application for a task, I'll choose a Gnome or GTK4 one first. Other apps implement odd controls that don't mesh with the rest of the system.