You are doing way better than you realise, so well done! At 30 I had just split up with a long term live in boyfriend, I thought my life was over. I had few friends, had moved country, had next to no money, no savings and no dating prospects. It turns out that 30 is not the weird cutoff that women are told it should be. I'm coming up for 40, 2 kids, married, made my own friends, a high end job, lots of savings, retirement accounts etc. It is entirely possible to get what you want, but a lot of it is luck, and most of it is honestly working on yourself. It sounds as though you might need some therapy discussions re. dating, health habits, life planning etc.
As others have said, if having biological children matters to you that much, focus on weight loss. Exercise, diet, even ozempic. Get the weight off now, as you get older it will only get harder. If you want to have chidren with someone, you've got no option but to put yourself out there when you're ready. In this age, no one is going to appear at your door to invite you out. Dating is a numbers game really in my experience. Having children alone is also an option, though bloody hard. You do have options though, and you are young. Remember that.
Good luck, and I really hope that you get what you are looking for.