The buyer ordered a gig but didn’t start yet. What will happen if he will not start and how long will it stay in my dashboard? Can’t find him, may be offline forever or don’t replying me is this something related to cancellation or not?
No, it’ll just sit there until the buyer leaves their requirements.
It won’t have any effect on cancellations etc.
it feels awkward to see something like that on the dashboard
Honestly don’t worry about it!
As long as the gig didn´t start yet, there´s no reason to worry.
If he wanted to cancel, he´d send a cancellation request, else he can´t get a refund.
As you already messaged him about it, I´d wait for them to make the next move now, don´t message him too much/often. A seller posted that he got a bad review because the buyer felt that he had messaged him too often a while ago, so be careful with that.
In case they will reply and say they don´t know how to start the order, maybe this can help you:
You’re very welcome - I hope it all ends well for you!