FWIW, I got 10 Gbit at home 2 years ago and built my router for $100 using a ThinkCentre M720q Tiny running on a Core i3-8100T (a mini-PC from 2019).

It draws around 15W idle, going up to 30W at full bore. For comparison, the 10G rental router from the ISP drew 15W no matter what (idle or full bore routing). This is with a 10GBase-T SFP+ which probably influences the power draw vs using a DAC.

It has no issues maxing out at 9.4 Gbit routing with a single or multiple streams of iperf3 with your basic IPv4 NAT+some port forwards config.