Is there a way to have COD Order Pickups at physical location when inventory is not managed there?

[IPPowerhouse]

I use SOS Inventory and it's API connection (as a location) to manage the inventory in my store. The physical location doesn't "have the inventory". Therefore when I activate in store pickup upon checkout it just hangs because the inventory doesn't really exist there.

Can you have the inventory updated via an API but still allow for a local customer to pay COD and pickup locally so they dont pay shipping?

Also, I would like to hide COD as an option for payment if they are not picking up locally. Is that possible. Thanks for any feedback.