how to redirect default links to permalinks ?

Why not use Settings->Permalinks?

i have it already, i just have a weird problem, the default links do not redirect to permalink when typing them in the browser, exemple:

when typing https://website.com/blog/?p=123 > it doesn’t redirect to https://website.com/blog/post-123.html ??? can someone help me ?

it’s not supposed to.

https://website.com/blog/post-123 will be redirected to https://website.com/blog/?p=123 while it still looks pretty in your browser address bar.

Note that there is no .html after post-123. An html file doesn’t actually exist at that location.