Pysync can be used using the command line. Setup the environment using conda and make sure that whisper and spleeter are installed. Then you can use this via the command line, providing an mp3 of the song and text file with lyrics you want to sync. The program will produce a .lrc file with timestamps which can be used by various lyric display programs.
python pysync [-h] [--output_file OUTPUT_FILE] music lyrics