https://www.artstation.com/marketplace/p/P3JBV/sci-fi-structures-vol-1

SCI-FI BUILDINGS Please open with blender 3.1+ includes more than 30 sci fi buildings. there are low poly and also some mid poly buildings 4k and 2k PBR textures metal roughness, FBX  included, also included a separate folder with textures. you can find some roof details, a gate and platforms in the file "new buildings" . Release Notes 1.3 - Fixed some texture problems in the "new sci fi buildings" files