Do I need to file a Form 1065 for a multi-member LLC if the business has not yet opened and is still under construction for 2021? Do I claim lease/build-out expenses now?

My husband and I are starting a business and obtained multi-member LLC in 2021. No gains or losses and leasing a stand-alone unit in a town center. Unit is still under construction but expenses are paid for leasing and construction in 2021, and business cards, etc. The business is not yet open.