If you would like to adjust your UI to work across multiple resolutions you could accomplish this with a mixture of the DPI scaling tool and anchors. I have provided links to both below. However, as stated above excluding certain devices would be on the distributions side of things. I would suggest speaking with the support team for the platform that you are distributing to.
DPI Scale Link: DPI Scaling in Unreal Engine | Unreal Engine 5.1 Documentation
Anchors Link: UMG Anchors in Unreal Engine UI | Unreal Engine 5.1 Documentation