Since you are looking for a subtitle for the 2021 film , you can find the appropriate .srt or .ass files on major subtitle repositories. These sites typically host files specifically synced for the WEBRip.x264-XviD release you mentioned.
: Often provides multiple language options and specific release matches. subtitle Bergman.Island.2021.WEBRip.x264-XviD.A...
: Useful for finding high-quality English subtitles for newer releases. Since you are looking for a subtitle for