This is called a “baby cot” and you can Google it to find out where to find them.
Our bassinet had a convertible feature in which it strapped to the parents’ bed and one side came off. The effect was something like this. Great for tired moms, breastfeeding moms, sore moms… it’s a great compromise if you’re not sure you want to co-sleep but still want baby nearby.
here is the best link I could find for these (most must be European as the cost was listed in Euros): https://www.armsreach.com/