where can i get the other 56 styles of this font?

Right here: https://typodermicfonts.com/gravtrac/

Is the family only available on fontspring and myfonts?

Yes. In 2021 it will also be available at Fonts.com, Font Bros & Paratype.

Will it also be available at linotype.com?

Same time as Fonts.com.

will all 56 styles be allowed on linotype.com, fonts.com etc?

Yes.

Hello, I love your work!
I would like to use this font for stickers that I sell on my online shop. Can I use this font commercially?
You are welcome to answer me here or write an email: info@rakelbar.de
Thank you and have a nice day :)

Sure, it's no problem. There's a commercial use license included with the fonts.

hello,,

Can I also use it on microstock for a logo embellishment?

example like the words "YOUR COMPANY"

my email : sandytadulako103@gmail.com

Sure, it's no problem. The free license allows that. There's a document included with the fonts that explains.