Those who believe that Afghans do not register as Pakistani in Turkey, read this interesting story:
Even if born and raised in Pakistan, Afghan refugees are deported to Afghanistan, a land they've never known
http://www.latimes.com/world/la-fg-afghanistan-refugees-2018-story.html
Turkey Deports Hundreds of Afghan Migrants
Repatriation on special flights follows massive illegal influx in recent weeks
Turkey was on Sunday deporting hundreds of Afghan migrants back home on special flights, in a major operation after thousands illegally entered the country in recent weeks.
http://newsweekpakistan.com/turkey-deports-hundreds-of-afghan-migrants/
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There are two reasons why Afghanis are trying to enter Turkey now:
1. Pakistan is about to deport them back to Afghanistan. This is why almost every person registered as "Pakistani" "refugee" is in fact Afghan and most of the Afghans in Turkey are from Pakistan.
2. The wall between Turkey and Iran is about to be finished.
The good news is that unlike Syrians, Afghanis are deported back to Afghanistan by the government.