I have no doubt Beech could build any number you want of the AT6 ,, as to “existing only on paper” ,, your “super tucano” exists only on paper also ... until you put in a purchase order... they don’t exactly build them and then hope for a sale....
Lets just agree that turboprop ground attack is the way to go ... The Philippines needs low hourly operating costs ... and jet doesn’t do that ... I wish we would give them a few dozen A-10’s with spares ...
The Super Tucano is in service or in production for around 8-10 air forces. That’s a lot for this category.