Comment by Kiro
Not in the US. The pipe just goes straight into the toilet. When googling around seeing articles about installing Tushy when you have rigid pipes they are still much more flexible than mine, with separate parts you can disconnect and replace.
I was in the situation you describe when I got a bidet. It's possible to replace that pipe -- a little more work of course, but it's still turn off water, replace pipe with flexi-hose, connect bidet.