A free program for Android, by Widget7.

Checker for Type-C Video is a free application that is compatible with the Type-C video output from a mobile to a TV. You can use it to check whether the output from your Android phone or tablet is compatible with the TV display you own. It supports many devices such as Samsung, Huawei, HTC, LG, OPPO, etc. 

The application will scan your device’s firmware to check whether it supports Type-C video. It does not require root and will run on your device, so it is safe and convenient to use. 

If your phone does not support Type-C video, you will be notified.