Being able to penetrate without surgery depends on your genetics, and ultimately, if you pump. I know one dude who can penetrate, but he pumps almost religiously and is going for a meta anyway.
And then I do know a guy that had a metoidioplasty a while ago. He couldn't use a prosthetic for a while after the surgery because he was still sore, and well, healing. But after a year, he felt comfortable enough to use a prosthetic that was built to work with his post-op body. OP, if you'd like, I can see if he'd be willing to share his experience with you.