Hello Acin, this is BáiYù of tofurocks here. It's unfortunate when assets don't have clear licensing and out of an abundance of caution, I might suggest submitting a secondary project that you're more confident about just in case you're unable to find replacements for those music tracks. Worst case scenario, drop us an email so we can figure out what to do for you.
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Thank you.
Status: I’m on the search for appropriate public domain music. After I cancelled my application and posted here, the music creator returned my message that the song (under CC BY 4.0) may not be used for any game, which along with the supposed musician’s Q&A specifically encouraging game use has me questioning if the other side is only spitting out chatbot answers sans awareness of what the English-language statements mean.
This experience has me sore about using audio for anything published. I’ll make ebooks out of my games to reduce risks for the bundle.