I'm hoping the fediverse might be able to help.
Our (very old) Chromecast has died and I need something to replace it that will play content from the various apps on my phone (i.e iPlayer, YouTube, Netflix etc) to my dumb TV. It doesn't seem possible to buy a Chromecast anymore and I'm not buying a new TV. I am willing to provision a spare raspberry pi or buy a new gadget, it's just not obvious what the options are.