Its unlikley, they are a massive pain to manage compared to lithium, expensive and have poor round trip efficiency. Oh and terrible energy density.
I'm not saying its impossible, but I'd be surprised.
I think the biggest two factors that play against them is that they round trip efficiency is something like 70-80% compared to 90%+. but the real pain in the arse is the charge managment. From what I understand, you need to charge them to full, and then discharge them fully. I don't believe that you can charge from halfway.
Most power markets work in 30miunute chunks, so managing charging/discharging would be really hard.
LFP promises better fire behavior than older Li-ion technologies, I think.
LFP's thermal runaway threshold is higher than other lithium ion battery types, but once TR starts, LFP generates more hydrogen gas that can explode if not air-vented out fast enough.