When streaming on the PS4 Twitch sometimes leaves the games category missing. The reason is that the PS4 will send the game that you are playing with a ™ or the Ⓡ symbol. When this happens you can correct this using the Twitch Creator Dashboard from a PC.
From the Creator Dashboard you can set the game in the Category section and then click “Update Information.”
You may have to click “Update Information” a few times to grt it to stick. If you donot have access to a PC, you can also use a chatbot to set the game. Using StreamElements you can use the “!setgame” command, in NightBot and Streamlabs use the command “!game”.
If this helped you please follow https://twitch.tv/markramsey and sub and bit me if you wish.