Low latency settings have been moved to the Keyboard / Mouse settings for some reason.
Like many others, getting stuttering - mostly in the newer maps - and FPS has dropped from a capped 138 to 100-110 on these.
Also, I found this setting [can't remember where now] which may help :
"
First, run a benchmark in the game, go to Play menu, Multiplayer, scroll right past Private Game to Benchmark.
It will take a about 1 minute to run and give you a result showing FPS etc. make a note or screenshot these.
Navigate to you CoD MIIW players folder - mine is
D:\Documents\Call of Duty\players
Use a text editor and open the file " options.3.cod22.cst " - make a backup/copy first if you're unsure and/or make a note of the existing entry below.
Scroll down/search for the entry:-
// Thread count for handling the job queue
RendererWorkerCount:0.0 = "4" // -1 to 16
This sets the number of CPU cores the game will use.
Mine was set to 2 - I've since got a new PC with i5-13000K so I've set it to 8 - I understand the recommendation is 1/2 the number of cores available.