I wouldn’t bet on it. The Wi-Fi/Bluetooth module in there doesn’t seem to have a standard form factor so even if you can slot in a standard module you might not be able to connect the antenna wires. Also, this MBP came out just around the same time as M.2 so you’ll probably have to go for an older mPCIe module.
A USB adapter is the far safer bet.
Nose surgery to remove polyps and correct a septum deviation. I’m getting out of the hospital today. It’s going to take a few weeks for me to fully heal but being able to breathe through the nose again is luxurious.