We may have felt something. That is our parents reject our spouse for a reason. The reason is quite strong. We ourselves want them to accept our spouse. I personally have tips on dealing with that. These tips are as follows.
We talk to our parents carefully. We ask them, what is a reason they reject our partner. After getting the reason, we ask the fact and evidence that support the reason from our parents. We analyze the fact and evidence, whether logical or not. If they are not logical, we explain the fact and evidence that refute them.
Parents reject our partners may be because they hold certain social values. If that possibility is true, we must not dispute these social values. We understand that social value well. After that, we spend our time with our parents. We explain the social values we profess to our parents. We explain the social values gently.
Source: https://en.m.wikipedia.org/wiki/Heart_symbol
We urge our partner to win the hearts of our parents. We also have to show our relationship with our spouse to our parents. We make sure that the relationship does not contain conflict and does not violate morals.
Our parents may assume that our partner does not have values that are considered important by them. If that possibility is true, we must motivate our partner to have that values. Even though our partners have not been able to have that value, our parents have seen our partner's struggle to have that value. Our parents then consider the existence of our spouse. Because our parents have valued our partner positively.
Hopefully, the tips above are useful for you.