Not aware of anybody that offers any live UHD content. A trial was around a few months ago for UHD sky sports, I guess it was a failure as it went away again shortly after. I can't see it happening until the channel suppliers start using x265 and we get some proper compression (twice as good) instead of the ancient x264 they all use still. Until then the bandwidth will probably be too high.

Viasat sport ultra and rtl 4k are two of the channels that carry F1 and are available on iptv. I think nordic one has both. Go to r/iptvresellers to look for a reseller

Ok4? Anyone got a link to check them out. Interested in the difference if they really do offer x265.