It's implied in the WN that he isn't human, and can't age. Humans shouldn't be able to make dragons pregnant, most of the species in the village want to have his children because it's hard for them to reproduce and some can't (e.g. Vampires). He might be a God or a new species to that world for all we know.
is he gonna age or die though? didn't he ask for a "healthy body"? I know chapter 1 said a body immune to illness, but I also know there's nuances in Japanese that don't reflect well in English so depending on how exactly he asked for that and the intent that world's god had for him...
He's a fucking farming god now and doesn't realize it. He's Old MacDonald. As long as he tends his fields he will be immortal. Death will forget him. Also, if he's that worried about dying and leaving people without his help, he should stop bitching about his night duties and start sowing some oats. Those centaur and minotaur women need some demigod kids, chief.
the god plastered him with a shit ton of abilities, expect to get a sudden timeskip where its 500 years later and he is still alive fucking his great great great grandchildren
Even if he wasn't blessed with immortality from the onset. He's going to gain it with how much they're worshiping him as some form of god of harvest or fertility.
I think immortality should be incidentally included too. Its implied by Ruru that MC's a beast or has loads of stamina in the bed room. His complaints about nightly duties were only ever his japanese heart and not being tired or anything. The stamina increasing foods were always for/sought by the women. So the subtle hints to immortality shouldn't be outside of reason.