No apps on my Grundig television?

I couldn't find any Netflix, TV Now, Amazon Prime and YouTube under my apps on my Grundig TV. Not even after hours of searching. Where my mother bought the TV at the time, the guy said it doesn't work on the TV only with an additional device. The TV is 5-6 years old. But it just doesn't have apps. How can I get the apps on the TV?! It would be nice if someone can help me.

That doesn't work at all, you would have to get a stick that can do that, which is connected to the HDMI input of the television

https://www.computerbild.de/...21143.html

Thanks for the star, greetings to you