Hi LaurenMcNicol,
I understand the frustration of Shopify removing the “Save cart” function without giving notice and forcing us to move to draft orders, which introduces inconvenience as you mentioned.
To bring back the “Save cart” functionality, I have developed an app for Shopify POS recently, which you can utilize back the “Save cart” and “View saved carts” tiles like previously. (I understand installing an app for this might not be ideal, I try keep the app price as low as I can to maintain the app’s server expenses)
The app name is Yagi POS Cart Helper (https://apps.shopify.com/yagi-pos-cart-helper ), the app comes with a 14 days free trial which you can give it a try. (I am happy to extend it if you need more time, or let me know if you are testing it on a development store)
After installing the app, you can then add the “Save Cart” and “View Saved Cart” tiles in your Shopify POS, and you can save cart and view cart easily as before. The saved cart is also viewable by another POS device, as long as they share the same location.
Here’s a demo video on how it works:

Hope this can help!
Regards,
Axel Kee (developer of the Yagi POS Cart Helper app)