Husband can't cum during vaginal sex. Need advice.

I am 22 years old, I have been married for a month. We have been in a relationship for 4 years now and for my personal reasons I was a vaginal virgin before marriage. This does not mean that we did not have sex at all, we had a fairly regular sex life, usually we had sex 3-4 times a week, it was anal and oral sex. On the day of the wedding, we had vaginal sex for the first time and he couldn't cum. We are now on our honeymoon and we have sex literally every day and the problem remains, he still can't cum during vaginal sex, we always switch to blowjob or anal to make him cum. I need advice.