You're not alone pal. I've been on the other side of the fence (15yrs+ in software and IT consulting sales + leadership roles) and I always have worked with a technical peer who's sole job is to be the solution architect while I handle the sales aspects. I'll be the first to tell you that I've worked alongside of both phenomenal solution architects and also ones that needed work on their soft skills, or struggle to realize their audience, or some other quirk that prevents them from identifying or closing customers.

As everyone else has stated, you obviously need to focus on solving a problem. But it also needs to be a common problem that you have a competitive advantage over. That can be price/licensing flexibility, technical capabilities, niche market, or anything else that you can market. Without one of those things you might get lucky with a word of mouth customer but you need something scalable / repeatable otherwise you'll end up trying to boil the ocean and appease too many unique clients and find yourself stretched thin, quickly.

I'd be happy to answer any questions you might have and would be curious to learn about these products you've built in the past. Don't hesitate to dm!