Is the USB-C to HDMI Still A Problem on Iphone 15 promax

I am considering upgrading my Iphone 12 to a Iphone 15 pro max. If the USB-C to HDMI does not work like it is supposed in the newest Iphone, I plan on switching to a samsung phone. I use Lightening to HDMI to airplay youtube, MAX, Netflix to my Vizio display from my Iphone. Even on my current Iphone, it is hit or miss on whether things work after software "upgrades". I am hoping this issue has been resolved.