I write this with true love for your effort, but do I read your 2021 annual retrospective correctly stating that you made $13K on $477K in revenue? Maybe some of your expenses are paying yourself for software development, and that's just your corporate income?
I would really consider raising your prices. I found that when I first started my business, I had a subconscious desire to replicate my income at my previous job, which caused me to irrationally underprice my products. After 2 years, I got over it, and it transformed my life. You've done an amazing amount of work. You should get paid for it (or, if people won't pay for it, get out). My dad used to say, "I don't do work for practice."
Consider reading this book:
https://www.amazon.com/Sell-Margins-Higher-Than-Competitors/...
I would really consider raising your prices. I found that when I first started my business, I had a subconscious desire to replicate my income at my previous job, which caused me to irrationally underprice my products. After 2 years, I got over it, and it transformed my life. You've done an amazing amount of work. You should get paid for it (or, if people won't pay for it, get out). My dad used to say, "I don't do work for practice."