The app does not perform any action on international orders. It just ignores it and will not attempt to fulfill it again. Amazon does not allow shipping FBA orders to other countries via API automatically.
The Shipr app can auto-fulfill based on location. For example, Orders from the UK will be fulfilled via Amazon UK FBA while orders from Germany will be auto-fulfilled via Amazon DE.
Only the following media products are eligible for international Multi-Channel Fulfillment: books, movies, videos, and DVDs (BMVD products). This restriction is enforced by Amazon and we cannot do anything about it.
In such situations, you will have to manually create a fulfillment order via the Amazon dashboard. This restriction is enforced by Amazon and we cannot do anything about it.