To ensure perfect synchronization, look for subtitles specifically tagged with the following: Robin.Hood.2018.720p.BluRay Robin.Hood.2018.YIFY or [YTS.AG]
If the text appears too early or late, most media players (like VLC) allow you to adjust the delay manually. For a 23.976 fps BluRay rip like this one, if the audio matches but the text drifts, ensure your subtitle file is also rated for 23.976 fps rather than 24 or 25 fps. Robin Hood [Blu-Ray] (2018) - DVD Movie Guide subtitle Robin.Hood.2018.720p.BluRay.x264.[YTS.AG]
* Runtime: 116 min. * Price: $39.99. * Release Date: 2/19/2019. DVD Movie Guide Robin Hood (2018) - Technical specifications - IMDb To ensure perfect synchronization