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inevitably if I see an attractive single mother profile that I could see as promising I won't even hear back. Not sure if they're no longer on the platform or if I think higher of myself than I'm actually worth lol.

Studies show consistently that people in OLD contact people who are "out of their league" in looks, men do it more than women but both sexes do so. So a couple of options:

Consider contacting women who are one step down from who you're contacting now in looks. Some of them may surprise you and be more attractive in real life than their photos would suggest.

It's a numbers game - you do have to contact a lot of women. Just don't do so with a generic hello that shows you didn't read their profile.

Try Bumble, where the women contact the men? (Isn't that how Bumble works?)

Look for more opportunities to meet people IRL.