1. This mouse may be looking for food or trying to enter your home. If you put food or garbage on the balcony, rats may be attracted. You can check your behavior habits, such as whether there is garbage or food on the balcony, and try to avoid this situation.
2. The mouse may be looking for a habitat. If there are many plants or other hidden places on your balcony, rats may be attracted. You can clean up the sundries on the balcony to ensure that there are no gaps and loopholes for mice to hide.
Rats may appear many times, so you may need to consider taking measures to prevent them from entering your house. This may include measures such as installing anti-rat facilities around the house or using rat poison.
In short, finding a big mouse on the balcony doesn't necessarily mean anything, but you should take appropriate measures to prevent them from entering your home or breeding.