Slow deliveries

Do you have buyers complaining about slow deliveries?  I have number of orders taking weeks coming from within my city, and those from Sydney have been taking 3+ weeks.  That goes for AP as well as various couriers.   But now I have buyers complaining.  The tracking says "delayed due to COVID19", so what more do they expect me to do?  I post my items immediately.  

 

There is no way I will be filling "missing parcel" form yet, but just wondering if it can be done on line?  Cannot see such function on the AP site, and  when I tried to chase  missing up 1/2 of an order sent by courier their complaint link was disabled.