Inconsistency on my wifi as of the last 2-3 weeks or so

I'm traveling at the moment, so am unable to do testing before the tech comes out.  However, I did see an interesting post about Win11 systems and using WiFi6 to get to Pods.  I'm going straight to my router, but the behavior on my HP laptop is consistent with the post -- except I've also seen performance deteriorate on my iPhone & it is on the router.  [https://forums.xfinity.com/conversations/your-home-network/issues-connecting-to-comcast-xfi-pod-after-windows-11-update/67db604267ee1e66469e2011] (I can't recall precisely when it began, but I believe it was before I did my Win11 upgrade).  I've rebooted the laptop & the router.  I am suspicious of the router.

I hope you have fun out there, Princess-in-Broomfield! I checked the signal levels to your home and the area. Everything looks good. With you already going through troubleshooting steps with our agents, it is best to have the technician out from here. Nothing is sticking out as the root cause of this problem. If the router is the problem, they can replace it while they are there. Whatever it takes. I will check back with you here after your visit to see how it went. 

I rescheduled my appointment, so that I could spend today troubleshooting - but the tech came anyway.
After fiber coupler replaced (standard operating procedure) and replacing the router, I did more testing.

Seems more stable.  But, dropped connections still occur on 6G.  6G is still not stable - but connections remain longer.  So, I saw 1.1Gbps down and some 700Mbps and 800Mbps, then it dropped.  Connections from my iPhone were 600-700Mbps, then eventually dropped to 100Mbps.  

To continue working today - I've dropped my Windows 11 networking to not use 802.11ax - so far, I've had a 20 minute zoom call without dropping.  

The tech was also going to create a ticket.  (Last night when I was working with an agent on reschedule, she mentioned that someone would check with me before the tech comes out - didn't happen yesterday... don't know if my appointment for tomorrow is still on the schedule)

@Princess-in-Broomfield , thanks for the update! Glad to hear there was some progress. We can check and see if there are any other open appointments, we would just need to get you authenticated to do so. Please send a direct message to us by clicking the chat icon in the upper right corner of the page, click on the pen and paper icon, then enter “Xfinity Support” in the “To” section. Please include your full name and complete street address.