Does the property management company have the right to temporarily use the business premises before it is allocated?

It should be before it is sold in the business premises.

If so, it depends on:

One is that the developer authorizes the property to enjoy the right to use the property, so the property company has the right to let the owner use it temporarily, but the use does not change any current situation of the property and is profitable, that is to say, it can only be used under the current situation, not for decoration, not for enclosure and not for profit-making activities.

The other is that the property opens a house privately and gives it to the owner for temporary use, which is absolutely illegal. Regardless of whether the use involves profit or not, the developer has the right to file a lawsuit against the property company and the owner.