The Hindi dub does not need English subtitles if you understand Hindi. However, if you want English subs for the Hindi audio track, search for "Salaar Hindi English subs." The timing is different from the Telugu version.
: Provides specific English subtitle files for Salaar (e.g., Salaar.English-WWW.MY-SUBS.CO.srt ). Salaar 2023 English Subtitles Download
If you have a local copy of the movie and need a standalone .srt file, you can find them on dedicated subtitle databases: The Hindi dub does not need English subtitles