Switching from crib to Montessori bed

My daughter will be 2 at the end of May and I’ve noticed lately while she’s in her crib she’ll start hitting her knee in between the bars. She can’t climb out of the crib, although I’ve seen her put her leg up like she’s trying to get out. (She also seems to maybe be going through a sleep regression, she’s having trouble going to bed/taking naps, maybe that could be why she’s hitting her knee in between the bars?) I’m debating on maybe on switching her to the Montessori bed? Is anyone going through something similar? Or what signs did your little one show that made you make the switch? Thank you in advance!