Sümüklü böceklerimi Mypage.com/product-desperation-page Dishwashers.com/us-dishwashers gibi bir yerden değiştirmek istiyorum
Mypage gibi bir şeye. com/product/description Dishwashers.com/us/dishwashers ve Dishwashers.com/uk/dishwasher
Yönlendirmeler olsa bile bu durum sıralamamı düşürür mü?

Personally I’d leave them as they are.
You ***should*** be fine with redirects, but there are no guarantees.
I’m a big fan of directories like you are looking to move to. It makes sorting data and analytics so much easier.
It will not impact your ranking if the redirection has been implemented properly, though you can see a temporary fluctuation in the performance.
I remember once I was considering changing category page slugs, as they were terrible and could be so easy improved, but was worried about possible side effects.
Then the trigger happy company co-owner just one day did it anyway. Decision made.
And yeah, it worked out totally fine in the long run. Overall our performance continued to grow. It’s never possible to attribute what of the many SEO activities I was doing accounted for what benefit. But yeah, changing the category slugs didn’t tank us at all
Do you understand what slugs (document names) mean>?