when does buyer request disappear?
I am not sure, what are you asking for? Like I am confuse, but I want to mention this.
When we are on level 1 only category based buyer request shows. And if in your main categories, no requests are showing then its mean, no buyer request has been submitted.
I am a new seller and I only see those requests which are submiited in my gig categories fall.
On level 2, or so on, buyer request never disappered.