It seems to me like where a period would be too strong and I want the clause after to be considered equally at the same time or possibly as a counterbalanced thing to whatever is to the left of it
If it were to parse it purely linguistically, it seems like not quite a list of things but perhaps a relevant after thought that a comma would be too weak for and a period too strong
A semicolon is used for connecting a supporting idea that is also a complete sentence rather than a dependent clause; this serves to support the sentence before the semicolon. The second sentence is connected with the semicolon to show that it is supporting the main sentence and shouldn’t be taken alone.
A colon is used when the supporting element is not a complete sentence: lists, examples, dependent clauses that cannot be parsed alone, etc.