As someone who has used both, I much prefer attachments. Something like https://bidetking.com/products/gobidet-gb-2003c-chrome isn't the usual flimy plastic garbage you get off amazon but lets you clean yourself without shoving your hand in your ass on a fully separate unit that takes up half the bathroom.

You can get a Toto Washlet attachment for ~$300 (who knows what it costs now after tariffs) that as far as I can tell is almost exactly the same model used in Japan. Heated seat, remote control, dryer, etc.

They’re great relative to not having the option. I panicked and bought two more in January for just what seems about to happen.

Should have gotten three.

If you can’t use one of above methods for reason, there’s some « seats attachment » to transform your toilet in a (cheap) Japanese style. Here’s a 79€ one [0] but there’s many alternative brands with less marketing bundled in the price.

0 https://www.helloboku.com/