Filter movies and TV shows on content provider

That doesn't really seem to be an issue:

Netflix has been added to the IMDb Watchbar and Watch Options in the US, IN, MX, and DE

And there are plenty of guides to Netflix, Disney, Hulu etc. in the editorial pages.

Yes, I'm aware of those, thank you, and see them as something other than solutions to the "filter" issue at hand.

At least in the iOS app, the "Watch Options" are a filtering option in the Watchlist.

Thanks, but under Streaming Subscriptions, only possible to filter on Amazon Prime.

So the filter is already there, but since IMDb is owned by Amazon they do not show other streaming services than their own.

Very sad to realise that IMDb isn’t independent. I’ll check what the competitors such as Rotten Tomatoes offer, unless they’re also associated with a content provider or streaming service. 

Which country are you in?

Sweden