You can find these files on major community platforms like DownSub or similar subtitle databases by searching for the exact filename.
The "A-S-S" in your query refers to the .ass extension, which allows for advanced styling like custom fonts, colors, and positioning. subtitle Project.Power.2020.1080p.WEBRip.x264.A...
This specific release is tailored for high-definition WEBRip versions of the film. You can find these files on major community