There is a way to watch on TV by connecting your smartphone or PC with an HDMI cable or conversion adapter.
However, please note that you may not be able to use it depending on the device, cable, line, etc. you are using.
It is possible to check the operation by outputting the following viewing environment test page to the TV, so please check if your device can output to the TV.
it does not support viewing on TV with methods such as Chromecast that do not transfer the screen of a PC or smartphone directly.