Sell NFT's


I am developing a freelance project with unity. The main idea is creating random scenes and views with integrated assets and create nft photos by taking screenshots. For example, users are creating a random village scene by clicking a button and then taking screenshots.

Whatever, I need to sell these NFTs on a public marketplace but I need it done in-game. So, we need to create a system which uploads NFTs that we created to the Opensea for example. There are many SDKs to connect wallets but I could not see any solution for uploading NFTs in-game with unity after my researchs.

Is there any solution or tactic to upload NFTs to public marketplaces?