URGENT, How can I peg/add a token amount when MINT an NFT

Hello friends, I'm developing a project for NFT stakes, I have a question, how do I add my token to NFT... an example of this is Position Exchange when you 'mint' a pre-mined token (They already have a collection of tokens with rarities and all, you just get drawn with a good nft or low-yield nft) with an amount of tokens, in nft this amount of tokens appears, is there any example that I can do the same ? I looked in their documentation about it, but nothing that helps much...

I can't understand the question, it's not very clear. Feel free to elaborate.