USB Ethernet Throughput

[nickf]

I have a Galaxy Tab9 with a usb ethernet adapter. Transfer throughput is terrible on ethernet, getting 140mbps down and about 250mbps up. If I switch to Wifi conneted to a Wifi6 AP I can get over 900mbps down and up. The same usb ethernet adapter on an ubuntu laptop can achieve 950mbps up and down. So I have narrowed it down to just being on the Tab9. Any thoughts?