There are a number of conversations about NFTs on this forum, which you can find using the Search tool (that little magnifying glass icon in the upper right corner of every page of this forum). Here’s one to get you started:
ALL ABOUT THE PROCESS of NFTs on VENLY & CRYPTO
NFTs aren’t sent to you in your package. They are digital products sent to you electronically. So, it’s likely that your package contained everything it was supposed to contain when you opened it.