Music app works really slow on 16 MBP

I got a new 16’’ MBP and I am unable to copy my playlists from my old 15’’ (Re-doing from scratch isn’t an option, too much data). I export my library from my old MBP’s Music app and copy it to the 16’’, but when I import the library, it imports all folders as “smart playlists” that include the whole library instead of folders., making the Music app work really slow. What am I doing wrong?

Hey there!
Hope the information and solution in this links helps