No. I would buy the other feeder and the double bowl later as an accessory. The single feeder bowl cannot be purchased online but only through customer service.

This model is basically the same as the one with the single bowl. The manufacturer also only offers the version for one shell. The double shell would have to be purchased separately.
I wonder whether the "solo" shell is included in the scope of delivery.
In other words, could someone from Galaxus specify the scope of delivery for this product?

There are two individual vessels.

I'm not sure I understand your question. This dispenser is designed for two bowls. The kibbles fall into two bowls at the same time.