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:
Often hosts subtitles specifically timed for popular x264/x265 encode releases. How to Sync the Subtitle subtitle Black.Widow.2021.1080p.BR.x264.AAC.6ch...
If the audio and text don't match up exactly, you can use these tools to fix the "offset": Since this is a Blu-ray rip, subtitles for
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). Since this is a Blu-ray rip
A free, powerful tool if you need to permanently change the frame rate or offset for this specific 1080p BR rip.