IGN states that Nvidia's RTX 4080 Super (notably not a midrange GPU) achieves 'around 129fps' using the same graphics settings at the 4K resolution ... but this Black Ops 6 benchmark has left ...
Technical analysis from a benchmark test using Call of Duty: Black Ops 6 revealed that the Radeon RX 9070 achieved an average frame rate of 99 fps at 4K resolution on extreme quality settings.
A sneaky IGN writer ran the built-in Black Ops 6 benchmark which saw the RX 9070 achieve 99 FPS at 4K, despite using alpha drivers. That looks to be in line with the RTX 4080 Super - for this one ...