Agreed one of the biggest disappointments of the revival was them not already being married and having kids. They could of had flashbacks of a wedding or thrown them a 10 year anniversary party where it feels like a wedding. Having them seem like they were going through a rough patch was weird. But I get that Lorelai was going through something because of her dads death and she had an emotional moment in Fall where she finally realized what was inportant in life. Instead of running away she decided to embrace life and marry Luke. She finally allowed herself to be happy. I knew going into the revival that they wouldn't be married so the one thing I wanted was to see them get married and that was the best part for me.

yeah i finished the revival and watched the end but till know i don't why they take 9 years to marriage and why they didn't have children while after they engaged they talk about children !!

Not to spoil anything but by the end of the revival you will know the answer to that question as to whether or not marriage is part of their story.