Amazon FBA Launch Advice Needed: Partial Inventory Checked In—What Now?

Hello everyone,
I am about to launch my first Amazon FBA product. I used the split shipment method to send my inventory to five different FBA locations. Three of them have reached the warehouses and are checked in, but two are still in transit and may take up to two weeks to arrive at the warehouse. Is it okay to launch the product now, or should I wait until everything is checked in? Would launching now affect my honeymoon period? How would it impact PPC ad placement? Will people in locations where I do have inventory still see my ads?