How to display custom metafields in Order Printer app?

Store Design
13

I couldn’t find a solution to this problem. So, I decided to fix it in my app - Serializer Product Tracking. The app can access order metafields and provides basic invoice printing functionality using a static liquid template behind the scenes. The template isn’t customisable yet, but I hope to finish this feature soon (this summer). It should provide similar capabilities to the Order Printer + access to custom Order metafields.