Mustafar – Black Park Country Park / Pinewood Studios, UK
The volcanic planet in the Outer Rim territories and the one-time home of Darth Vader! In the decades since his death it has become home to cult colonists who scour the remnants of Vader’s Castle which once loomed over the iron trees.
Kylo Ren cuts through these colonists at the very start of TROS to find the “ark” that contains the wayfinder to Exegol.
I believe these very brief scenes were either shot at Black Park Country Park or on the lot at Pinewood.