There was some kind of patent shenanigans about a decade ago around LFP.

I'm not sure if China invalidated dodgy patents or threatened to and got a good deal (or some combination) but I think LFP in China escaped a lot of patent fees as long as they were sold in China. This probably partly explains the regional nature of LFP success so further expiries might help the rest of the world catch up on LFP prices and adoption.