I'm providing an update regarding this issue as I know some are interested in the discussion and it is a real problem.  There are now similar discussions about this issue on many other sites, such as Android Central, Reddit, XDA Developers and others.  In addition, the original thread on the Google Pixel Community Forums has continued to grow with people reporting this issue with other carriers and around the world in areas such as Qatar (link to the thread below if you're interested). 

At this point, with so many with other carriers and in other countries having the problem, it does not appear this is a Verizon only issue.  That being said, the vast majority of Pixels are running on VZW, so this thread has a proper place here.  People are reporting as well that they have gone back to Android 9 (Pie) and their full signal is back.  Also, a factory reset does nothing.  Don't waste your time with it.  We all know the customer service reps will tell you to try this because they don't have a clue what we are talking about most of the time. 

I did receive a private message about this asking me to give my phone number and someone would call me.  I had to respond 3 times with my phone number, but eventually someone called.  Of course, that was the only time during the day I was in a meeting and couldn't answer the call.  They didn't provide a number to call back, just the regular customer service number which I found useless.  I did call and spoke to a customer service rep.  It is clear when talking to them that I know more about how these devices work than they do.  The rep was asking me inane questions like "was I roaming" or "why don't you just switch to wifi all the time if you have a bad LTE signal."  Really, that is supposed to make me feel better? 

Again, the only point of this is to advise the other people who have posted on here that if you can't stream or get data where you used to before the update to 10, and you are dropping calls when you never did before 10, or have no signal at all where you did before 10 that there are many others with the same problem, and Google is seeing this on their forum.  We are due for the monthly security update for October any day now, and maybe something will get fixed.  I use my phone for work, and am now missing email notifications because my LTE drops to zero bars in places where I never had an issue before.

  https://support.google.com/pixelphone/thread/13566467?hl=en