Problem with get request in wordpress?

Question

PHP

Why doesn't this get work?

https://exmaple.loc/account/?r=d33fe85b-85c2-4b8b-9c46-f4be69854256

The API gives me a link to the mail, but for some reason the get parameter is empty (var_dump($_GET))

Answer 1

Copied, printed on a clean assembly, everything works

By the way, in WordPress it is correct to correctly register variables on the hook query_vars, and receive usingget_query_var()