You can find these subtitles on major community databases. Search for "Mortal Kombat 2021" and look for the "ION10" tag: : The largest database for movie subs.
: Use the H key to delay subtitles or the G key to speed them up. MPC-HC : Use F1 and F2 to shift the subtitle timing. subtitle Mortal.Kombat.2021.WEBRip.x264-ION10Mo...
If you download a subtitle and the text appears too early or too late, most media players allow you to adjust the timing manually: You can find these subtitles on major community databases