Take one of those ideas. Make a site that reviews all the current competitors in the market.
Put the one with the best existing seo strategy in first place.
Contact them and let them know and ask that they link to it, offer to write a guest blog post about how you reviewed every tool in the space and this one came out on top, and why.
Share the site all over where you can find people talking about the niche.
if the niche is not too big, this will often get you ranking for that term. Google loves “best ___ in 2023” content.
You are building a traffic source.
Then you can build a product and put your product in 1st place or even above the list entirely. Write a blog post about how you took the best of the other tool you reviewed and created the perfect tool for <certain persona>.
Ok, end riff, i have no idea if that will work but it seems repeatable and not too difficult. It really is all about getting traffic.