As far as I remember, using Hybrid Wiimote with all bindings cleared made the Wiimote Speaker sound play through system speakers while allowing playing with a real wiimote. However it may cause issues with games that uses more complex controls (like titles that requires Motion Plus) but I hadn't tested...
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)