I think it's about creating your own normal here. Eventually, if you do separate, you may need to re-evaluate but what is important is the environment for your little one. If staying under the same roof is creating a hostile atmosphere there maybe not the best and some space may be good. But if you work together to co parent and can remain civil.
We’re great when it’s comes to parenting and great friends .
It will add it's own challenges. If you're both set on it, then you can do it - by it surely wont be easy since you're used to being in a relationship - falling back on habits of relying on each other, instead of being independent of each other....
I know someone who did that for awhile until they ended up moving out