Magento 2 Store Pickup Extension - Cynoinfotech
https://www.cynoinfotech.com/product/store-pickup-magento-2-extension/
Magento 2 Store Pickup allows retailers to implement a Store Pickup shipping method on their online stores. Retailers can easily enable in-store delivery option for customers with Store Pickup Magento 2 extension. The Magento 2 Store Pickup extension allows your customers to shop online and pick up from an offline store. Add "Store Pickup" as a shipping method to your Magento 2 checkout and let customers choose the nearest offline store to collect their products and save shipping time and costs.