LUXE Bidet NEO 320 Plus - Warm Water, Dual Nozzle, Non-Electric Bidet Attachment for Toilet Seat, Patented Slide-In Install, 360° Self-Clean, EZ-Lift to Clean, Feminine & Rear Wash (Chrome)

Inline heating is definitely more convenient, but there are much less expensive products that you can connect to the hot water line of your bathroom sink. I have this one (regular price $66): https://www.amazon.com/LUXE-Bidet-Plus-Next-Generation-Self-Cleaning/dp/B0B1H3YKSN?th=1 As it turns out I didn't really need the warm water, even during winter (California winter, but still...)