Images within menu not optimized

Hi. We recently made a big push to optimize the load speeds for the site. We’re using WPRocket, asset cleanup and imagify and have had big improvements. However, when running page speed insights I am still noticing one thing that is not changing. The screenshots shown in the diagnostics seem to be picking up the images that exist within the mega menu as being a problem, even though all of those images have supposedly been optimized according to the media library and imagify. I am not sure what do do about this next. Any ideas?

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