Can I go directly to Macau without a visa if I have an American green card?

If the landlord entered China from Hong Kong,

You can enjoy visa-free transit for seven days.

Note that it is only visa-free for transit, not visa-free for entry.

So if you enter from other parts of China and then go to Macau for a few days.

And if you don't leave Macao, you must apply for a Hong Kong and Macao Pass.

Or go directly to your home, it's not that much trouble.

The Embassy of China can apply for a visa to Hong Kong,

You don't have to go back to China to apply for Hong Kong and Macao Pass.