You have same situation like me, i have already a child but they do not consider it enough for having a genuine marriage. i am also wondering what would be the situation if i got refused in court as well. In Pakistan one cant redo nikkah and marriage, what would be the alternate?
Try to collect data as much as you can. My ADR was refused but I won an appeal. Don't worry. Even collect repert of pregnency. It was my second marriage and simple in presence of only 20 people but as genune marriage I make file more than 900 pages with diffrent section like
my index was divided in 13 section
1 all photos
2 all shopping receippts
3 all my visit to my husnabd and pictures and shopping receipts as well as if you stayed in hotel then hotel receipt
4 call records
5 what's app about 500 pages translated chat
6 name of spouse on benificiry documents
7 ragisterd marriage
8 letters from neighbour and family members
9 medical reports to making efforts for pregneny( in your case good you have pregnency report)
10 gift and cards send to each others and money send to spouse
11 tickts and boardinf pass
so you can collect all possible data to proved your marriage. I have age gap 10 years but due to my file I won apeal