Yoto player at bedtime

We just got our 4.5 year old a Yoto player. The past couple of days they have fallen asleep while listening to it but now I’m worried it’s either too stimulating and they’ll stay up too late listening or they’ll become dependent on it to fall asleep… so I’m curious what others have tried? How do you incorporate it into bedtime without these troubles?

Edit: Thanks all! Looks like most use the Yoto to help kids fall asleep independently. My kid can fall asleep independently without something like this but was considering using it to teach her to handle middle of the night waking on their own. I’ll mull over some strategies ya’ll mentioned!