MBL is the owner's bill of lading, that is, the ocean bill of lading. As long as you get MBL, you can go to the shipping company to pick up the goods, while HBL is an agent, so you can't go to the shipping company to pick up the goods. Only when there is an agent in the port of destination can the freight forwarding company issue HBL.

It is impossible for us to book shipping space at the port of shipment, but only give HBL to the customer, that is to say, the customer only has HBL, and when picking up the goods at the destination port, we can only rely on HBL's agent there to pick up the goods.

The agent at the port of destination can get MBL and pick up the goods from the shipping company in advance.

Supplementary question-

You can't go to the shipping company to pick up the goods without MBL. You must go to the agency to change the order first.

If HBL can pick up the goods as you said, then why go to MBL?