Ender magnolia info

With the game launching in 1 month give it or take it, do we have concrete information about number of homunculi, number of bosses, estimated time to finish the main story, etc? Saw some YouTubers talking about 30 homunculi and 30 hours to finish but didn't find the information source Side note: is there a way to pre-order on Xbox? I'm not finding it in the store