Not on a modem only device. About the only setting you can change on that is if you’re using wan port aggregation or not. 

My configuration is an SB8200 with a pair of AX-6600 mesh wi-fi satellites.  

So there isn’t anything to tweak really. 

What AX6600 system do you have? Maybe it supports wan port aggregation. You’d have to look at that specific routers manual to see if it supports it. Not really worth enabling through unless you’re paying for greater than gigabit speeds. 

Thanks. I’m not going to change that. 
the reason that I’m asking about being able to tweak. My system is because prior to the Harris I had a Netgear router that was totally configurable and I was just wondering if this has that ability also.

I’m using the app and it’s very basic. 

ARRIS SURFboard mAX W121 Tri-Band Mesh Wi-Fi 6 System, AX6600