We tried swaddle sleeping bags when she was younger but she didn't like her arms being stuck. Although I don't think it would help in this situation anyway as she thrashes her legs around too. Its the leg thrashing that makes her start to move her arms. It feels a bit late to try swaddling again as won't be long before she starts looking to roll.
My boy is the same. During the night until 5-6 am, he will sleep, wake up for feed and fall asleep, and sleep in his next to me. But after 5 a.m., if he falls asleep, he wakes himself. So, since he was 2 weeks old, I put him in my bed, and I make sure he is safe and we both will sleep for a couple of hours. Otherwise, both of us would be restless 🤷♀️😊
Have you tried a swaddle? My little girl was so active that she'd wake herself up and get extremely upset but since swaddling she sleeps well!