1. CC-BY-SA4 don't allow you to apply additional restrictions such an "do not resell/repackage" or "no NFT"
Or you are using proprietary license that looks like CC-BY-SA4 and has these restrictions or you are using plain CC-BY-SA4. You can't say it is CC-BY-SA4 while you are trying to apply additional restrictions
2. 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