Perhaps you're getting confused with French style bidets?[1]

The one people are talking about in this thread are simple and much cheaper.[2]

[1] https://www.google.com/search?q=French+bidet

[2] https://www.amazon.com/Handheld-Toilet-Adjustable-Pressure-F...

https://www.amazon.com/Purrfectzone-Sprayer-Toilet-Diaper-Br...