Um!? I certainly wouldn’t try the bodge of thread tape.
Self tapping plug? Never seen one. A correctly retapped new thread and oversized sump plug would be one way, but you will first have to go down the route of finding a suitable ‘oversize’ plug, then buying (expensive) the correct thread tap for it.
Hellicoil? possible but depends on what wall thickness you have around the current plug socket.
Ease of removing the sump pan on your model? Safest bet is to renew the sump. OK, could be expensive, but cheaper than an engine rebuild if the current plug decides to leave home.
Kind regards,
Gareth.