Hello! As of my last update, there isn't an official IPTV app available for the Nintendo Switch. However, there are unofficial ways to potentially watch IPTV on your Switch by using homebrew applications or custom firmware.
One popular app that has been mentioned in the forums is "Switch Unlocked V1," which is a custom firmware that allows users to run homebrew apps and games on their Switch. You might want to explore this option, but please be aware that using custom firmware can void your warranty and may pose security risks.
Remember to proceed with caution and always ensure that you are using legitimate software to avoid any potential issues. Let me know if you have any other questions or need further assistance!