TCL television update possible?

I have a TV from the TCL brand (tcl u50s6906).

It has a very old Smart TV, only with Netflix and YouTube, but Amazon Prime, etc. Everything is not on it.

Then to my question. Can I update this TV using a USB stick when I look for updates in the TV settings, nothing comes up If so, which update do I need.

You have to make yourself smart on the manufacturer's side.

It is usually possible via USB.

At least with the ones I've had so far. Samsung and LG