the video using a player like VLC Media Player , and it should load the subtitles automatically.
Since you are looking for the "complete feature" subtitles for this specific BluRay release, you can find the verified SRT files on major subtitle repositories: subtitle Made.in.Italy.2020.1080p.BluRay.H264.A...
: Offers a wide range of community-uploaded subtitles. You can filter by the "1080p.BluRay" tag to find the exact sync. the video using a player like VLC Media