You can create multiple collections inside one single smart contract, for that you can use "Galleries" (or sub-collections).
A Gallery has the following features:
In this way you can browse one gallery independently of the other, regardless of whether they are on the same smart contract.
If you are planning to use sub-collections, the first step is to enable the galleries option in the collection.
Galleries are available for all smart contracts flavors
To enable the galleries option do the following:
Enable galleries on the NFT Collection
Choose this option if you want to disable Galleries from your collection
Choose this option to show the galleries in an horizontal tab menu at the top of your collection
Galleries as Tabs
Choose this option to show the galleries in a vertical dropdown at the top of your collection
Galleries as Dropdown
Once the galleries are enabled on the collection, there are multiple ways to create and manage galleries: