Hi Eric Bee,
As Jeroen mentioned, the one I linked came from Haiku Designs but it was just the result of a random google search to show an example of a suitable set up.
There are a few platform beds listed in the foundation post here but I’m not the best source of guidance about furniture or beds since it’s not an area I have the time to do much research.
Yes … it would certainly need some reinforcement with only 3 cross slats, no center beam, and minimal center support.
Phoenix