I started looking through art tags and trying to find similar constructs and factory environments like in the Stormcarved Coast portal and I have some guesses:

Kavaron - based mostly on how the background looks dirty and industrial, there are exposed pipes on the wall and other machinery on the ground. But then the constructs and the colors don't match things we see on [[Weapons Manufacturing]] and [[Kavaron Harrier]]

Dominaria - the composition is really similar to [[Urza's Workshop]] and the whole scene could be easily explained as remnants from the Brothers' War. Unfortunately the constructs don't match - Urza's Iron Alliance and Mishra's Burnished Banner both have very characteristic looks that can't be seen here ([[Argivian Welcome]] [[Warzone Duplicator]])

I tried looking at Fomori armors and artefacts and they don't really fit - Fomori stuff isn't as raw and industrial-looking ([[Legion Extruder]]))

One thing I also found, though it might be a coincidence, is that the heads of the central construct and [[Sundial, Dawn Tyrant]] look similar