losing internet connection 4 plus times a day for a couple minutes at a time.

This has been happening for a month now.  2 weeks ago comcast said they were replacing hardware to deal with intermittent service issues, but it hasn't helped. My modem does not go down, it appears to be an external issue.  I have a sonicwall tz200 firewall that monitors and manages my internet connection  and home network with deco wifi6 mesh Access Points.  Comcast says there are  no issues in my area.  Is anyone else having a similar issue?