Connection Problem with Verizon Gigabit Router & MacBook Pro

Has anyone else had connection issues with the newest Verizon Gigabit router (white tower) and a MacBook Pro (2018) or older iMac (2013)?

My computers will connect for a short time, then drop connection and I can't get it back unless I reboot the router. Or it will be super slow and hang a lot. Again, will work for a few minutes to half an hour or so, then drop. I went back to using my old Verizon router which works just fine. Other devices on new router work fine (iPhones, Roku, etc). Been dealing with this for a few months.

MacBook is wireless, running Catalina 10.15.7.

iMac, I tried wired ethernet and wireless, running latest Mojave.

I cannot update my software because I use the iMac as a second display for the MacBook (target display mode).

Verizon replaced my new router, had techs out a few times, and had me run speed tests, try different things, reset stuff, etc. The person who helped me looked into it and said she believes it is a compatibility issue between their new router and these Macs. She was very helpful and had researched all kinds of things that we tried. However she said until enough people complain it won't get pushed through as an issue for them to resolve.

I also recently took my MacBook to someone else's house and I had the same issue there, they had the same router. Just wondering if anyone else is having these issues. Not sure if it's an Apple problem or Verizon. I did see someone on Verizon's forums having the same issue with their MacBook.