I am not sure what you mean.Thank you. I am unsure if he did it deliberately. He may be unaware of the marriage procedure.
I am seriousely doubting that a Catholic who is practicing doesn’t know that a civil marriage only will be invalid in the eyes of Church (so for us, for God). He needs to have a Catholic weeding at the same time.
I am doubting that he doesn’t know that a Catholic marriage cannot be dissolved. Most of people who live in a a Catholic culture know that.
I am doubting that he doesn’t know that a couple should agree with having children if it is a biological possibility for them when they marry in the Church.
Maybe he had have a civil marriage only because he feels unsure?
Anyway, you don’t need his agreement to be baptized.