Technically, she could. But she does not want to share the cake with anyone. From what I hear and see, most would-be contributors have to wait for up to several years for their contribution to be even considered, and even then it's mostly minor fixes.
A while back there actually was an initiative on her discord (and not even from Inno herself) to get writing contributions, but even that outright stated even if your proposal gets pre-approved and you do all the work to get it implemented, it can take "two or more years" before it gets merged in, with no guarantee it ever will.
