Hey,
I’ve been trying to add my Bitcoin wallet address with the instructions given…
However, the TX Pending never goes away… takes forever and eventually it just doesn’t happen.
Any clue on what might be the issue?
That sounds like the general issue of your transaction keeps pending (which happens for any Ethereum transactions). You probably have to cancel and try again https://metamask.zendesk.com/hc/en-us/articles/360015489251-How-to-Speed-Up-or-Cancel-a-Pending-Transaction