I just ran some speed numbers

I plugged our laptop directly into the router and got the 100/100 speed. Then I unplugged the laptop and ran a speed test with the laptop next to the router over the wifi network. Speed dropped to 46/37.

I then tested the speed using one of our iPads. Again testing right next to router I got a speed of 79/70. I then tested my iphone and got 60/50.

Nothing else is streaming in our network right now.

I did find some people that successfully were able to set up an Eero mesh system using a double NAT (or bridge) set up. I may try that. I may upgrade the router too as it won't cost me much to rent one from Verizon (actually it's like $3 a month).