You can create drops that need to be claimed with atomicdropsx smart contract.
Custom drop pages are created manually by the AtomicHub team and are meant for companies creating big and highly reputable collections.
This guide and this video tutorial might help you learn more about drops, and how you can create one yourself.
Complete guide to NFT drops on WAX by EOS Amsterdam: https://eos-amsterdam.medium.com/complete-guide-to-nft-drops-on-wax-8ab84b2274b3
Video tutorial on creating drops by Anyobservation: https://www.youtube.com/watch?v=MXO2iNuelTs