You linked a user manual, this contains nothing about how to send commands to the printer. It will only tell you how to set it up, etc.
Here is a programming manual for TSC printers:
On page 11 it shows your printer TTP-244 Pro supports TSPL2 language, so this guide is suitable. Briefly looking through, it looks quite similar to the example I gave, so my first question would be - are you using Raw Printer type in SambaPOS like I mentioned previously? Also, what print out do you get from the printer when you try? You should let us know and also upload a photo of it.
If my example doesn’t work after that, please take a moment to refer to the command guide I linked, it explains how to print different layouts on the printer. Honestly it can take a long time to get it working perfectly, even myself I only did it as a proof of concept and was happy I could get “something” to print, then I know for future I can work more on it if need be. Unless you are lucky to find someone else on the forum who has already done it for your or a similar printer model, you will need to try yourself to get it working.