I have exactly same problem like everyone here. It started from yesterday, before it was everything fine, whole fut champions played without any lags and fps drops. I am playing 120hz and 120fps (I could play on 144, but some stadiums are bugged ofc and there are little fps spikes between 130-140fps, but thats totally another thing). Yesterday I had some fps drops from stable 120fps to 65-90 fps and it makes game in slow motion for 2-5sec, so i need to fully predict my moves, cause after that slow-motion its going like on fastforward speedrun for a 1sec. I tried even to reinstall Windows, cause I've been not doing it since last year, but i didn't change anything. I tested literally everything, every settings on ea, on nvidia panel. FPS dropping on every stadium, online and offline mode, doesn't matter its proclubs, season or ultimate team. I don't want to play on 60hz, I bought RTX4060 to play this game at least on 120hz.
SPECS:
Ryzen 7 2700
16GB RAM
1TB SSD m.2 nvme
RTX4060
Monitor 180hz (playing fifa on 120hz)
Windows 10, after reinstall newest Windows 11 - doesn't matter