A Plugin Could Be Better

In some ways, it is an excellent plugin that allows for inserts of code under varying conditions. However, the documentation is minimal and needs augmenting and maybe the addition of a cookbook. A simple example: where is the variable $content defined? It seems to be an additional block (under the Gutenberg editor) below a PHP snippet. There doesn’t appear to have an “if-then-else” capability. There appears to be some sort of substitution by variable– {{variable name }} — such as in Twig or Smarty.
I would say that this is a good start with more to come.