Fill Select on relationmanager creation form

How can i pre-fill parent relation selector on a create form on a relationmananger?
On the Practice View, i have a Patient relationmanager, and when i create a new patient on that page, i want to have already selected the practice, but i'm not sure how I can implement that.

Select::make('practice_id')
    ->label('Practice')
    ->helperText(fn (string $operation) => $operation !== 'view' ? 'If the practice you are looking for is not in the list, please make sure it has a filled name.' : '')
    ->placeholder('Select a practice')
    ->options(fn () => Practice::all()
        ->pluck('filled_name', 'id')
        ->sort(SORT_NATURAL | SORT_FLAG_CASE)
        ->toArray()
    ),


I tried using afterStateHydrated, but I'm not sure which injections i need to get to get the ID of the practice of which page I'm on right now.
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