When you mint on Sloika, one of the steps is to sign the listing (a temporary permission for Sloika to sell the NFTs on your behalf).

This listing contain pricing and availability information.

Your NFTs will be visible immediately on OpenSea, LooksRare, and every other open Ethereum-based platform, however they will be shown without prices (because you didn’t list them on these platforms).

Any collector on these platforms can make an offer though, which you can accept if you wish (please read the exception if you chose a randomized Gacha drop).