Broke my iPad Pro 12.9 screen which costs 300 USD, i need help fixing it.
i found online the glass and digitizer/touch for only 50 USD
do you know where in lebanon they can change the glass only of the screen without changing the LCD?

Example: https://www.youtube.com/watch?v=OuoPEp_Xpdk
The screen is laminated to the glass, so changing it without swapping out the entire LCD is extremely difficult, and even if it can be done, it's almost inevitable that you will end up with touch sensing issues. I personally wouldn't recommend it. I will PM you the number of a very skilled technician, give him a ring and ask him what he thinks and if he can do it.
It is better if you get the whole assembly, much easier diy.