Is there some documentation of how the part delivery payment amounts are calculated in the api?
For example how is fees for delivery handled? is the fee divided between all deliveries and what happens if you add more deliveries if you already captured some money?
The delivery fee amount is distributed on the deliveries weighted on value of the pert delivery items.
There are bugs i the Litium connect API 2.0 and the klarna addon for part deliveries so you need upgrade to Litium 7.6.2 and Klarna checkout v3 addon 4.7.117 if you want to work with part deliveries.