I am not sure which desktop you are on, but you can get larger fonts.
fonts can be configured for certain apps and also affected by screen resolution.
I do not wish to overload you so instead here is a screenshot of jwm with feh controlling wallpaper xrandr controlling screen resolution. If any of this interests you....I will guide you.
Note I do not connect to a TV so did not set the largest zoom possible.
https://i.imgur.com/YcTf1Zh.jpgthere is a loss of quality in using jpeg and that is noticable in the menu text in screenshot,
in real life its quite viewable.
2) So if interested name your desktop
Name your terminal and name your preferred font and size
Describe how you are currently getting any zoom (magnification) please?