This may seem obvious. But I'll say it anyway.
For any overweight person, getting down to a healthy weight will likely make almost every single aspect of their life better. And dating will certainly become easier and more enjoyable.
Dating is unnaturally hard for overweight people, because being overweight is an unnatural situation. People are overweight mainly because we live in a world surrounded by artificial, purposefully addictive foods. We're supposed to be eating a diet of vegetables, fruit and meat. And the body is supposed to move during the day, not sit still.
Do you think that a 40 year old woman living in a tribe like our ancestors did, would ever struggle with their weight? Would this woman ever struggle to find a man to spend time with? And would they have to spend their time swiping random people on a digital screen?
We live in a strange, unnatural environment.
Anyway, just a few thoughts.