Keys on Samsung S7 FE Tablet Book Cover Keyboard not working / how to remap them

Two rows of keys have stopped working: 4RFV and 5TGB. Apparently, this is not fixable and I have to buy a new keyboard. But that's not in the budget currently. I'm looking into something called keyboard mapping as a temporary solution,at least I think it's called key mapping. I want to be able to press something like "Alt P", to type "R". I found the External Keyboard Helper app. But I think it's for Bluetooth connections. The Book Cover keyboard is connected by the 3 metal dots at the bottom. Does anyone know of any workaround to get the keys to work through some other keys? There are other options I will look into as a last resort (buying a new keyboard). Im trying to keep this keyboard because it's not really feasible to take notes on a touchscreen. And the great thing about the tablet and the keyboard it came with was that I could take it to classes and meeting. The tablet model name is SM-T736B. The keyboard is EF-DT730. Any help is appreciated!