If you are looking for subtitles for specifically synced for the 1080p.WEB.H264-NAISU release, you can find them on several dedicated subtitle repositories.
Here are the most reliable places to download the .srt files: subtitle At.Midnight.2023.1080p.WEB.H264-NAISU
Since this is a WEB rip, subtitles for other WEB releases (like AMZN or HMAX ) are likely to be compatible with the NAISU version as they usually share the same frame rate and start time. If the timing is slightly off, most media players like VLC allow you to adjust subtitle delay using the H and G keys. If you are looking for subtitles for specifically
: This site typically hosts multiple versions, including hearing-impaired (SDH) and various language options. Check the At Midnight listing on OpenSubtitles. subtitle At.Midnight.2023.1080p.WEB.H264-NAISU