Notification filtering by label

Is it possible to filter email notification by issue label?

(GitLab Enterprise Edition [13.9.4-ee])

I don’t think so, but if you search for the labels on your .../group/project/-/issues/ page, there should be an RSS feed button on the top-left of the page, just above Open (N). So, perhaps you could pipe that to your email via IFTTT or Zapier?