Date married men.
There are a huge number of married men in my social group who want to have kids, but their spouse is unable or unwilling. These men sound just as forlorn as you.
One finally divorced his wife and is engaged to a woman with two young sons. I’ve never seen him as happy.
I’d estimate that 10% of my married male friends are in this circumstance. Half are deeply committed to their wives, but the other half could be swayed by the opportunity for a family. Those 10% of men, are significantly better catches than any of my still unmarried friends.
My unmarried friends have mental illness, drug/alcohol addiction, or… both. One has a significant physical disability. It’s a horrible pool to date from.
Again, disregard my advice.. but that’s what I’d do if I were you.