I don’t have that chip myself, but it looks like it could be at least similar to (this issue)[https://www.intel.com/content/www/us/en/support/articles/000057261/ethernet-products/gigabit-ethernet-controllers-up-to-2-5gbe.html], since your speed seems suspiciously close to half of the chipset’s max. Do your versions already match these fixes?
iOS 17 will have to allow some form of official sideloading (at least in the EU) by law, so you might just be in luck