Just purchased this router, 

I have Samsung Note 10 plus and S20 Ultra, both on wifi 6, but the wifi speed never tops 500Mb; I have 1Gb internet and with ethernet, the speed is consistently higher than 950Mb. For comparison, my Orbi RBK50 non-wifi 6, occasionally give >600Mb wifi speed and consistently in the range 500Mb.

The 2nd issue is the link aggregation, is there any way to have this activated for WAN? My modem is SB8200 and it has two ports that can do link aggregation. But Archer only has one WAN port. 

Regards, 
Jason