Use both systems in one contract [erc721 ++ ERC115]

I have the following two contracts

1.Contract : ERC721 : Each address will make only 1 minting

2.Contract: Each address owner will make more than one minting from hundreds of ERC1155 with very different ids (we use ERC1155 for this reason anyway)

I have a few questions :

  1. Can I use these two contracts in one contract?

  2. I see single use in almost all of the projects, so only a structure with ERC721 or only a structure with ERC1155, why there is no use together, there must be a reason.

  3. If I can use both in one contract, how can this be solved since everything will be double like two mints, two tokenURIs?