Into the Mirror - Collectibles Help

I don't know if it's too soon, but does anyone know where I can find the OST collectibles of the first two worlds? I've finished the game, but I can't find those two collectibles to complete the Challenges of Broken Mirror and Lonely Wasteland.

https://preview.redd.it/f1oryor48eyd1.png?width=1599&format=png&auto=webp&s=0505e6c6ad6e13d65c1d3fa140908d82a60116c8