In Revit 2023.2 temporary dimensions shown in a 3D view cannot be made permanent as the appropriate icon is not shown. I understand that a non-locked 3D view will not allow dimensions but a hint like 'permanent dim saved onto <name of view>' would do the trick. Much easier than changing from 3D to floor plan, section etc, reselecting the object in question, zoom in on it and find the make permanent icon. This is probably more of a family editor topic but could be applied to projects as well (where the perm dim would be landed on the current workplane's initial view).