Yea, I've read most of this in the past at the time I haven't started using QNAP yet, so most of the details slipped from my memory.
Now another important question. I've tested the QNAP (NSS wifi) wireguard performance and the results look lower than expected.
Below are the results for comparison without NSS.
Here are the wg-bench results without NSS. (Updated with Simultaneous wg-bench & WAN Speedtest)
Iperf3 results without NSS.
Edit 1 - I've made additional really important tests that you can see on the updated link above.
So the total combined throughput of Speedtest WAN & Wg-bench is 1Gbps + 500Mbps for the NSS build and 500Mbps + ~600Mbps for non NSS build.
NSS build wins!
Edit 2 - Updated data with kernel 6.6.