This is what is under layout control
Layout and the Contents pane—ArcGIS Pro | Documentation
and this is how a layout behaves
Add and modify map frames—ArcGIS Pro | Documentation
Is this the behaviour you are seeking to supress?
Note:
While the map extent of each map frame is independent of other map frames, the contents of a map frame's map are not. A map frame is just like having another map view open. For example, if you select some features on a map, those features are selected in all open views of that map—including in map frames. Likewise, if you turn off a layer in one view, it turns off in all views. Layer properties cannot be set per view.
... sort of retired...