Something that would be super awesome is a tool where you can click a location on the 3D Mesh and have it highlight the location on the UV Map. Sort of like the find cursor function on Windows, but to find a location on the UV Map. It could even work in reverse, clicking on the UV map would ping the location on the model.
I spend way too much time finding where something is on my UV maps, currently I make a pink paint stroke or fill layer with mask to find where it is, but even then sometimes I have to look a while to find it. This would be especially helpful on models with UDIMs.