You can find and download the matching subtitle files (usually in .srt format) from these reputable subtitle databases:
: Most WEBRip files are 23.976 fps. Ensure the subtitle file you download matches this frame rate to prevent the text from drifting out of sync. subtitle Eternals.2021.IMAX.1080p.WEBRip.x264-R...
: Since your file is from the RARBG group, downloading a subtitle with "RARBG" in the filename increases the likelihood that it is perfectly synced to that specific encode. You can find and download the matching subtitle
: One of the most comprehensive libraries where you can search specifically by the release name (e.g., RARBG) to ensure the timing matches your video file. subtitle Eternals.2021.IMAX.1080p.WEBRip.x264-R...