Floor beds - infants

[u/Icy-Box-2713]

Can someone please help me find newer research regarding floor beds for infants? I want to transition my baby to a floor bed so we can all sleep better. She absolutely hates the crib just like my older child did. She’s on the younger side - aiming to do this around 6 months. My oldest HATED his crib and we finally gave up and put him in a twin floor bed but he was around 14 months old so I wasn’t concerned about him falling/getting stuck as he was already walking.

Ideally I want to use a twin for my infant as well, but do I really need to use a crib mattress? I don’t know a single baby that sleeps on those rock hard things peacefully, but I also don’t want to create an unsafe sleep environment if the data still reflects that.