At what point do you receive rent rolls, leases, expenses

[Lateefah Washington]

I am interested in buying a commercial property (office, retail, or multifamily) and was wondering at what point I receive information on income and expenses such as rent roll, leases, maintenance cost to calculate NOI and cap rates. I noticed in some listings the agents put the info but in lots of others it is not included. I have an agent and she has given me listing without this info and I find it very hard to make a decision without this info. She said after you show interest you will get more info but how can I know if I am interested without this info. Is this the normal process? Is she correct? Do you just need to sign LOI's to get it? Can someone explain how it works? Not sure if I need to get a new agent or what. Thank you. I am located in Texas in the DFW area.