Disappearing instruments?

[Idkidk12457801]

I was searching for a remake of the song Thousand March from Pizza Tower, and I found one that seemed to have new instruments (Distortion Guitar 2, Drum kit 2023 2, and Drum kit 2023 3). Excited, I decided to try and make a song with these instruments. However, I didn't find them. If I pressed the edit sequence button on the song that used these, however, I was able to use them. Is this a premium thing? Early access? Bug? I'm confused.
Edit: I now know about the clone feature

[Lopyt]

Those are clones. You can clone instruments to have two or more versions with different settings

[OftenGuy]

I was searching for a remake of the song Thousand March from Pizza Tower, and I found one that seemed to have new instruments (Distortion Guitar 2, Drum kit 2023 2, and Drum kit 2023 3). Excited, I decided to try and make a song with these instruments. However, I didn't find them. If I pressed the edit sequence button on the song that used these, however, I was able to use them. Is this a premium thing? Early access? Bug? I'm confused.

No, there's a Clone feature if you check the Advanced settings under the Instrument settings on the instrument you want to clone.