Fussy sleeper

Valeska

FTM here, LO is 3 weeks old and will sleep in her mamaroo, boppy or being held without fussing. At night she fusses while sleeping in her bassinet, I think it’s the flat area she doesn’t like. we use a woombie swaddle because she flails her arms and get out of regular swaddles. Don’t know what else to do to make her comfortable. Any advice is appreciated.