I don't know if it's even possible, but if anybody can do it, the genii at ZapperFi would be the ones. My idea is if it's possible to show offers made to NFTs listed on all the major NFT marketplaces such as OpenSea, Rarible, Nifty, etc.. Then we would add to the one-stop-shop aspect that already exists in abundance at ZapperFi. Imagine not having to log in to each different platform to check if you have any offers for NFTs you are trying to sell.
P.S. I am very sorry if this has already been suggested. I looked through the feature requests and did not find anything like it, but perhaps I missed something. Thank you Zappy Fam!