Yes, you can put team+<team-slug>@tracker.debian.org in your Maintainers
fields.
eg. team+pkg-security@tracker.debian.org for https://tracker.debian.org/teams/pkg-security/
It's possible to use this right now (it will not generate any bounce) but
direct mails to those team addresses are not yet forwarded to team
members.
But all packages with such maintainer emails will automatically be added
to the list of packages maintained by the corresponding team and thus all
team subscribers on tracker.debian.org will automatically get the
associated mails (unless they muted the team).