Oh thanks, I feel a bit dumb now as I didn't even look at the selectable options. 😅 (Basically shows how used I was to these keybinds xD)
It definitely seems the keybinds have been altered by these new features. From the looks of it's luckily a setting change inside the Transparency Manager (Which is located at the bottom of the drop down menu) for my support issue.
But sadly I cannot fix the '4' key command as vegetation is separated from the scenery, and it only toggles the scenery part. (Unless the vegetation may have received their own new key command?)
Edit:
After a bright idea, I managed to fix the '4' keycommand as well. As I went to check the keybinding menu. I tried to fill out the same keybind for scenery, as for vegetation. This worked! So now standard keybinding behave for me, like in Rct1 and 2.
Thanks