at least Sky in the UK explicitly block you from using airplay when the app is running. They detect airplay in use and overlay a gray box on the content. I’ve seen no work around for this and suspect it’s a sign of things to come for other broadcasters and media houses.

Which do not have porn apps either. But I can over complicate everything by streaming my safari session I guess?

I guess safari supports porn

You can Airplay any video content from the web, or mirror the screen.

So I use another device to browse and the TV only for watching. I get it, sounds annoying just to enjoy some porn

There’s always infuse player and plex, into which you could place whichever pornography your heart desires.