RelationManager Page Url Paramater

In version 2 you could navigate to a specific page by using the url parameter

page=2

page=2

or in my case

page=23421

page=23421

, but it doesn't appear to work in v3.

I tried to no joy. Who has solved this?

    #[Url]
    public ?string $page = null;

    #[Url]
    public ?string $page = null;

RelationManager Page Url Paramater - Filament