I have no idea how pancakeswap works. Is it decentralized in the sense that you simply advertise your project and pay fees, because the number of fake coins on it is alarming? Binnace recently became the official sponsor of Lazio, and scammers have already taken advantage of this to defraud its followers by offering airdrops and tokens. Pathetic.
You can add a token there by simply posting the contract address, that is why it's very important to check and double-check the contract address of the token that you want to buy, this is basic, all tokens created emanates from the smart contract, you can get the smart contract from the coin's website or in their official chat group just be sure you are asking the right admin.