Mine does that all the time too. I guess its normal and doesnt affect any development if she's meeting the requirements for her age.
Not that i know of. I used to sleep in that position when i was a baby. Lol. My kids now do it. Not that i do it anymore.
That’s normal. It’s a comfortable position for most toddlers. No need to worry if your kid sleeps this way.
My Son sleeps like this too! I doubt will affect anything