IKEA has a bed. It looks like a single bed, but you can put it under the bed and pull it out and turn it into a double bed
You are talking about a bed of children. Now, there are many factories in this bed, and the price is not very expensiveSome have 3 beds.
What you said is Hennessy reclining bed, sofa bed can be used as usual, or a single bed, if there is a need to pull into a 1 meter 8 double bed, bed and drawer can storage. Suggest you go to IKEA stroll, they have many of these beds.