The following python tool can be used to let it analyse the audio and subtitle and synchronise the subs to generate a new synced file. It works for offsets at the beginning, not for sync issues later in the file.

https://github.com/smacke/ffsubsync

Install on Linux Mint 22+:

pipx install git+https://github.com/smacke/ffsubsync@latest

Usage:

ffs video_file.mkv -i orig_sub.srt -o new_synced_sub.srt

Untested alternative without limitations:
https://github.com/kaegi/alass

Other alternative:
https://snapcraft.io/subsync
https://sc0ty.pl/
https://subsync.online/
https://github.com/sc0ty/subsync?tab=readme-ov-file

https://github.com/denizsafak/AutoSubSync