8BitDo controllers for Nintendo Switch 2 have turbo buttons along with several other helpful customization features.

Horipad Turbo: One-minute review It’s hard to find good Nintendo Switch controllers at the $30 / £30 price mark. Typically, budget gamepads around this point simply don’t feel all that great ...

After all, the Arduino isn’t actually measuring the CPU speed, nor is it directly controlling it (that’s still done by the original Turbo button wiring).