Handle auth callback url (url&params) with v6

[Adi9378]

Hello everybody,

I'm sorry if it is a double topic, i tried to search a solution on many ways before to ask here, maybe i didn't find the good keywords

I upgraded from v5 to v6 recently and i don't successfully understand how to handle callback url after an authentication.

For example i have this route:
<Route path="/region" element={} />

I chose a region, then it's going on an external authenticator, after authentication it will redirect user to the url before authentication, but it will add a params in url to manage the authentication for example:
/region&param=example

On v5 it was able to handle this kind of url to route to /region, but on v6 it does not handle it anymore.

Do you know what am i missing ?

even if i knew that it would not work i tried:
<Route path="/region*" element={} />
<Route path="/region/*" element={} />

thank you for reading !