renderHook scopes don't work

Hi- I'm new to this so probably doing it wrong:
in panel():
            ->renderHook(
                'panels::content.end',
                fn (array $scopes): View => view('extra-stuff', ['scopes' => $scopes]),
                // scopes: [
                //     \App\Filament\Resources\ClientResource::class,
                //     \App\Filament\Resources\ClientResource\Pages\ListClients::class
                // ]
            );

with the scopes uncommented, I would expect to see my extra stuff under client list/view/edit etc, right? if I comment out the scopes, my content appears, but otherwise it does not.
I'm freshly updated on v3.0.30 after trying this for a while on .27.

TIA for any advice!

update to add: when I @dump($scopes) in my view, it's an empty array every time.
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