Floor beds or Ikea has a nice reversible one that I'm thinking of getting for my 2-year old. He never slept in a crib, always on a floor bed with guardrails and we love it. The Ikea bed would be a little fancier now that he is older. We can turn it into a loft bed in the future if he wants.
https://www.ikea.com/us/en/p/kura-reversible-bed-white-pine-80253814/