It isn’t obligatory to have kids but it is highly recommend and encouraged in Islam. Usually the father has a strong influence on his children. so he should make sure that they are raised according to the teachings of the prophet Mohammed and his purified progeny (peace be upon them all).
The husband MUST ensure that his children will be raised to not praise the enemies of Ahlul bayt (as) which many Muslims unknowingly do. He should raise children who will disassociate from the oppressors of the imams (as).
It is good for him to also try and guide his wife in a way isn’t forcing her. If you both decide not to have children for the time being then that is entirely your choice.
May Allah grant you success