There's at least two different bands with this name.
These are photos from concerts where Sinmara played, so they may be of other bands that played the concert as well.
Cosmic Void Festival 2023 Sep 15 - 17, 2023 London, England, United Kingdom Uploaded by Josh King
Eistnaflug 2015 Jul 8 - 11, 2015 Neskaupstaður, East, Iceland Uploaded by Nemtheanga