How do you get more instruments such as French Horn 2 and Pizzicato 2?

[PikachuTheGDPlayerYT]

I saw a sequence that had French Horn 2 and Pizzicato 2 and I was just wondering, how do I get more instruments like that on the website? I feel like it would help if I got more instruments like that when I'm composing from my device. Like actually, I really need this. If you provide helpful information, thank you so much!

The image is attached to this post:

PLEASE HELP THIS WILL BE SUPER VITAL TO MANY ARTISTS!