Pretty sure it was due a crap BT Dongle that didn't meet the requirements (at least Bluetooth 2.1 + EDR plus Microsoft or Toshiba stack if you're on Windows) or unknow BT stack, not the Wiimote itself. And considering a Dolphin Bar setup, if it's a genuine wiimote then it's 100% success rate, same for BT dongle connection if you're using a proper stack...
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)