There are at least two bands with this name:
These are photos from concerts where Unearth played, so they may be of other bands that played the concert as well.
Furnace Fest 2021 Sep 24 - 26, 2021 Birmingham, Alabama, United States Uploaded by Logan Bowers
Furnace Fest 2021 Sep 24 - 26, 2021 Birmingham, Alabama, United States Uploaded by Foreverking
Furnace Fest 2021 Sep 24 - 26, 2021 Birmingham, Alabama, United States Uploaded by Mjhudson81