In the instruction booklet that came with my Sig P365 (my one and only striker fired and or polymer gun) specifically states NOT to lubricate it! I would think that they are concerned with oil attracting dirt and debris and jamming up the striker from smooth and normal operation.
When cleaning and lubing the pistol I make sure to keep oil out of that area. If I do accidentally get some in I will disassemble completely and dry out with patches and compressed air. They say NO OIL in the striker tunnel area either.
Lube on a firing pin/striker is likely to attract and accumulate debris and may turn gummy. The end result is the firing pin/striker no longer moves freely and you can end up with failures to ignite primers. In short, no lube on firing pins/strikers.