I accidentally locked myself out of the quarantine hotel. Do I need to quarantine again?

No need.

But it’s best not to. According to the quarantine regulations, no one is allowed to step outside the room. There will be a dedicated person delivering meals at a fixed time every day. Trash is thrown at the door, and someone will clean it up at 8pm every night. It is said that if you go out, you will be prosecuted according to law.