Here’s the situation:

I used to get 5-10 orders daily, but now sales have dropped to 1-2 orders per day.

I recently applied for Brand Registry and created new listings for the same product.

Previously, I used the self-shipping method, but I’ve now switched to Amazon Easy Ship.

I noticed that the estimated delivery time for Easy Ship is showing as very long, which may be discouraging customers.

Despite increasing my ad campaign budget, the sales haven’t improved.

Questions:

Could the long estimated delivery time with Easy Ship be the main reason for the sales drop?

Is there a way to optimize or reduce the delivery time using Easy Ship?

Should I revert to the self-shipping method or explore another fulfillment option like FBA?

Could the creation of new listings have impacted my visibility or sales ranking?