If you have the room, I would separate them now and pot them up. They only need/should be potted in smaller containers for now anyway. I haven’t done this in a while, but I used to pot them up individually once 4 leaves grew in a rosette and next set was starting. You can cut off part or all of the paddle of the leaf cutting if the size/weight unbalances the baby... lean the stem of the cutting against the edge of their new pot for support.
If there are more than one baby rosette per cutting, you will have to do a bit of surgery — use very sharp fruit knife, craft knife, or razor blade and be sure to include an attached segment of the cutting leaf stem with roots for each baby... or you can simply choose one best among them and cull the rest.
If they start to grow into each other, it’s way too easy to accidentally break the tiny baby leaves, especially when the paddle of the leaf gets caught in a crotch of leaf stems. They are also harder to inspect or take care of when tangled or hidden, spoiled leaf can affect overlapped healthy leaf, etc.
...Oh, if you can, you may want to move them to southern exposure for the winter, though it might be OK where they are if they are blooming.... but sinc the winter days are shorter, sun is weaker and sunny days are less frequent, I used to migrate the houseplants to +1 brightness windows during the winter, and vice versa for the summer. (I say used to because I move almost all the plants outside for the summer now).
Also, when the baby leaves don’t get even light from all directions, they will develop elongated stems and twist around, and won’t form the fully open rounded rosette shape. You’ll have to bear with the malformed leaves until the plant grows enough good leaves to cull them.
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