Just to make clear, my "no" was in relation of current Dolphin versions (they don't support what you're asking), not as "no, this wouldn't be implemented never, period" (I reread the posts and got that impression). Perhaps you could open an issue report in the bug tracker asking for it? Some day someone may pick your suggestion (due the open source nature of Dolphin, devs/contributors come and go randomly). While it may be technically possible to use DualShock 4 sensors, personally I would find that setup awkward to use, but PS Move seems like a good replacement if implemented. Give it a shot and see what happens...
Avell A70 MOB: Core i7-11800H, GeForce RTX 3060, 16 GB DDR4-3200, Windows 11 (Insider Preview)
ASRock Z97M OC Formula: Pentium G3258, GeForce GT 440, 16 GB DDR3-1600, Windows 10 (22H2)
ASRock Z97M OC Formula: Pentium G3258, GeForce GT 440, 16 GB DDR3-1600, Windows 10 (22H2)