[Quesiton] Are we (global server) gonna get every song eventually?

Like Bad Apple for example. Or are some songs exclusive for Japan server only? Sorry if this is a dumb question, I tried to search it online but only found early 2022 answers and dont know if they are still valid. Thank you!
Also, gameplay from the Japanese version of the game looks really different--is our game gonna always stay like this or will it eventually gonna get that update too?

-Kanade fan