We are having a problem with Store Locator not pulling through to One Page Checkout for the Pickup Option. It has been enabled in the Admin area, we've uninstalled both Plugins; OPC and Store Locator but hasn't resolved the issue.
As a workaround for the meantime, it's set up as a shipping method.
https://ibb.co/LRGL6Yn
https://ibb.co/4MB1MNp