Sleeping on her stomach

So my little girl is a little over 4 months and has just started rolling from back to belly, and is doing it CONSTANTLY. She loves her crib because she rolls around in there, and sometimes she’ll wake up but play in there for another hour or so. We’ll here’s thing - tonight I put her down on her back, and legit by the time I got in my room to grab the monitor, she was on her belly. I went back over and flipped her back to her back, but she just did it again almost immediately. This is the first time she’s tried sleeping on her belly, and of course I’ve freaked out because of all the SIDS talk.

Should I be worried? I’ve read online that it should be fine since it’s easier to go front-to-back, but I’ve only seen her go back-to-front, so I’m just nervous. I’ve also been known to be an anxious FTM lol so feel free to tell me if I’m overreacting 😂😂