I have my shop set up and running however my clients are complaining about slow shipping times up to 3-4 weeks.
My fulfillment partner is Printful.
On their website they have the option to ship using Regular Post or Express Shipping with FedEx/UPS/DHL.
On my store when checking out, only the flat rate shipping shows up.
How can i set up the multiple shipping methods and provide different options to the clients?