It depends. Rental properties are usually treated as passive activities, and passive activities are excluded from the definition of a qualified trade or business. However, rentals that qualify as trades or businesses under IRC § 162 are not considered passive, which means they could potentially qualify for the QBI deduction.
Generally, this means each rental real estate enterprise (a rental property or group of similar rental properties, including K-1 rental income) must satisfy these requirements:
Rental services can be performed by the owners or by their employees, independent contractors, or agents.
Read more about how a rental property can qualify for QBI here: Can I get the QBI deduction on rental income?