How to know if ghosted

The point of ghosting is that you don't know.

But if you have to ask, best to assume you'll never hear from her again and move on.

If you’re wondering, the ghosting already happened

Chill. 1 day absence is not ghosting. Anything could have happened and she is unable to reply.
Start worrying if it is prolonged silence.

She ghosted you bruh

She said ...booooo!

Could be already effective
don’t count the days. It doesn’t help anything

Be productive and busy .
Don’t worry too much about someone not talking to you for a day.

Lets hope she isn't a ghost then you could be haunted

How many days has it been

I would say yes she is ghosting you

24 hours. That's my rule of thumb.