Reading through docs and says to install via snap install --classic --channel=2.9/stable , however, only that candidate is available? Am I missing something?
Seems you may have got things a little confused, since that snap-id is not MAAS but Juju.
$ what-snap e2CPHpB1fUxcKtCyJTsm5t3hN9axJ0yj e2CPHpB1fUxcKtCyJTsm5t3hN9axJ0yj: juju
I think they’re still working through RC of their 2.9 release, but you should join them at https://discourse.charmhub.io/ and ask there.