Please help

We have recently started the transition from cosleeping to her sleeping independently.

Back story: My LO is a breastfed 9 month old and we have been Cosleeping since she was about 2 months. About a month ago she started to sleep on her stomach and constantly turning and I figured it would just be safer to have her sleep in her crib

We have tried everything: putting her in her crib after she falls asleep, when she wakes up putting her back to sleep and back in the crib and repeat for hours.

We tried putting the crib in our room to see if she left less “abandoned”

We even attempted to place her in the crib half asleep and continue soothing methods…. Doesn’t work one bit

Every time we put her in when she’s asleep she wakes up and she cries and cries and cries. We left her in here for almost 15 mins once to see if she would stop crying… she cried until her face was purple.

What in the world can we try next?