Recently, the setting to change resolution for the display or configuring several monitors is not showing in Budgie Settings anymore.
I am not able to access the display settings as described at e.g. Solus Help Center
You can configure your display(s) in Budgie by opening the Budgie Menu and then clicking on “Displays” in the System Settings category.
I do not have this setting anymore (it used to be there).
Here is a screenshot (I am using the German version, but there is no "Bildschirm" (german for Display) setting)
Also if I search for "display" or "bildschirm" in the start menu I do not find such a setting anymore.