I still have a lot of KF94 masks leftover, so I want to know how many of them I can bring back with me,

I see that Korean Air still lists 30 masks maximum in carry on luggage, but Asiana does not list a mask limit on their website.

Did this limitation go away now that there is plentiful supply?

Assuming there is a restriction, If it's a reusable mask with five replacement filters, is that counted as one mask or five?