@brooksben11 I have also done a IR project, (designed custom HW with IR remote) started with a TV remote to build a recieving thing, when that worked build a custom remote. way back when soldering your modem/HIFI system was a thing.
I advise to do KISS approch first, surely you have tried to aim the tv remote any direction and where “supprised” the tv still reacts, right ? verifying the led on the remote with a cam in dim light conditions while standing several meters / yards away will confirm your assumtion. the reciever might be unable to recieve beause of poor design… not saying you are wrong just confirming your thoughts might be wise before heading to your intended solution.
also (de)soldering a new reciever/transmitter is easier than all other options
searched “IR RAW” ? Faking an IR remote control using ESPHome might be what you want to look into.
hope it helps !