Give it time. It's normal for kids to wake in the night and need you, even if it's hard, and it will take some adjustment. We bedshared from birth and definitely mine wouldn't have been sleeping well yet in a room by herself at 27 months. She still woke a couple times a night, and though she went to bed in her room, she would usually come in to us at some point when she wanted to. I would just find something that works for all of you and take it slow.
Does she start the night in her own room? If she hasn't been doing this already, I would start there. Put her to bed in her room, but then also keep a mattress on the floor in your room for her to come in if she needs to. Mine literally used to get up and just come in and I barely woke up many nights, but it meant we all slept better and then we just slowly transitioned from there. We also had a gro clock so she could see if it was morning yet or not (because it's always dark in her room). That helped a lot. One day she just announced that she wanted to sleep all night in her own room and get up when the sun on her clock came up, and that was it. We took away the mattress in our room. She woke up a bit for maybe the first week or so, but we just sat with her and helped her fall back asleep. After that, she's slept through pretty much every night in her own room. But we didn't do that until 3.5. She just wasn't ready until then and we like sleep so we did what we needed to for everyone to get plenty of sleep.
If you don't want a mattress in your room and one of you needs to put her back to bed in her own room, divide and conquer. One of you take the baby and one of you take her. I would have them in separate rooms if they are waking each other up, at least until things settle. If you're BF, you do the night feeds with the baby and your partner can settle her when she wakes, that way you're both getting sleep. And just stick with it. A gro clock might help, but for us, it was just doing it when we were all ready and being consistent.
