Depression can show up in any other ways and it's not based on a person's physical appearance we can conclude saying that they are or aren't depressed.

Here are some of the signs which have a possibility to miss out:

You look as you have all sorted in public, but in personal space you may be messy

Disappearing for days and not texting back your loved ones and isolates oneself in the name of 'self care'

Smiling and seeming happy while socialising and mask drops after you get back home

Feeling cynical and like nothing really matters

Increased anger, irritability and gets frustrated easily

Changes in behaviour

Frequently putting yourself in risky situations without thinking about the danger

Source: https://www.instagram.com/p/CxD6W52sZbR/?igshid=MmU2YjMzNjRlOQ==