I haven’t read all the comments so accept my apologies if this has already been discussed.

I play at a farmers market on Saturdays and use my iPad bluetoothed to my buskers speaker.

This is what I do: I get the BIAB sgu files like I want (in the right key and sometimes with a capo), put the lyrics in, save it as a video and then copy the video to my iPad. Works very well. My only gripes are that when I have a midi part (like a lead riff) then saving as a video does not include the midi track. Also, it exports to avi format which takes up a lot of space on my iPad so I normally convert the video to mp4 before copying to my iPad.

LyricLab – Where words become music https://www.lyriclab.net/