Question: is the lg stylo 3 mhl compatible?
Answer: The Stylo 3 doesn't do MHL. About the best you can do is a Chromecast device and the Google Home app installed in the phone (which I prefer, even if the phone does MHL, so I'm not limited by wires). It doesn't need a smart TV, it doesn't even need an internet connection*, as long as you have a wifi router running.