It's difficult to give hints on creating successful recipes, as OE is so complex.
You can see an example in the first line of the recipe given in latest blog post, of how recipetool was used:
https://bkhome.org/news/202205/scrcpy-c ... edded.html
But, it often creates a very incomplete recipe, and that's where lots of prior experience with getting recipes to work, comes in.
In fact, that recipe for scrcpy is nothing like the auto-generated one.
One useful hint is to compile the package in a running EasyOS first, to clarify the steps required, dependencies, etc. That's what I did with scrcpy, so I knew that the recipe generated by recipetool was very wrong.
I also knew from other recipes, what is required in a meson build.
Sometimes, recipetool does get it exactly right.