Is it reasonable that there is no elevator in property decoration?

This is not right. The elevator is the property of the owner, who has the right to use it.

Legal basis:

People's Republic of China (PRC) Civil Code

Article 271 The owner shall have the ownership of the exclusive parts of the building, such as residence and business premises, and the right to jointly manage the * * * parts other than the exclusive parts.

Article 272 The owner has the right to possess, use, profit from and dispose of the exclusive part of his building. The owner's exercise of rights shall not endanger the safety of the building or damage the legitimate rights and interests of other owners.