I remember that the BBC iPlayer is only available to download through the Play Store on a small list of certified Android TV devices:
https://www.bbc.co.uk/iplayer/help/questions/supported-devices
You had to side load the app instead on all the other devices. Is that still the case in 2022? Or is the app finally available on any Android TV device that comes with access to the UK Play Store?
https://www.apkmirror.com/apk/media-applications-technologies-for-the-bbc/bbc-iplayer-android-tv-2/