GraphHopper open-source for Indoor routing

Hello, I have a couple of questions:
I see some old related topics about using GH for indoor routing. What’s the actual state of this? Is GH usable for indoor routing navigation without customize the code at the current open-source version?

Second, is there the possibility to use a database to store the map used by GH as source?

Thanks in advance, if someone can point me in the right direction :wink: