Block, demagnetize or remove Magsafe in iPhone 12 pro?

So my iPhone 6s finally is done for and I reluctantly "upgraded" to the 12 pro for lack of any alternatives. I'll eventually get used to the added size, weight, lack of a fingerprint sensor and no audio output. Brave new world.

What definitely bothers me though still is the new "magsafe" "feature". I don't like magnets near my mechanical watches (and yes, I know there are others in the phone anyway). So I'm looking for a way to either block, demagnetize or even remove the ring of magnets on the back of the actual phone (and no, I will not buy an Apple case with even more magnets and will never use the magnetic charger, wallets or god knows what else).

Anyone ever done this?