Since this is a Blu-ray rip, subtitles for other "BRRip" or "BluRay" releases of Black Widow will generally sync perfectly. You can find the specific .srt or .ass files on these major platforms:
Searching for the exact file string typically leads to subtitle repositories and media databases. If you are looking to find, sync, or understand this specific release, Release Technical Breakdown subtitle Black.Widow.2021.1080p.BR.x264.AAC.6ch...
Use the H key to delay the subtitle or G to speed it up while the movie is playing. Since this is a Blu-ray rip, subtitles for
One of the largest databases; it allows you to filter by "Blu-ray" sources specifically. One of the largest databases; it allows you
This specific naming convention is a "scene" standard used to identify the quality and source of the file: The title and theatrical release year. 1080p: The resolution (High Definition, 1920x1080 pixels).
If the audio and text don't match up exactly, you can use these tools to fix the "offset":
A community-driven site where you can search by the exact filename to find matching timings.