I have a motherboard with both WiFi & LAN. Windows 10 gives the option to create a network bridge but this doesn't increase my transfer speeds at all.
The combined speed is supposed to be 1.8 Gbps. The max I get in Steam is 102.6 Mbps and the upload speed is abysmal at less than 1 Mbps!
I assume you are trying to double up your network speed but a network bridge isn't that. Bridging allows you to extend that devices network to another device, like your router already does. Doubling up is possible with 2 ethernet ports but requires that your router can handle that too, and most don't. The reason is that gigabit ethernet is generally faster than any internet speed you'll get, and if you can get those speeds then you'd want a router and computer that supports 10 gigabit ports.
There are other reasons why transfer speeds won't be faster like limitations of the router, network overhead, speed limits on other servers, etc.
If I could get 100mbps I'd be very happy with that. :D