What it the license?
Thanks for your comments, you can freely use this asset in your projects, it is only required to mention the authorship of the assets, greetings!!!
So is it CCBY4? https://creativecommons.org/about/cclicenses/
Yes
You should add the license into metadata for the asset packs: "Edit asset pack->Metadata->Release Info->License for assets" It will increase the size of audience that will be able to find your art
