When __callStatic is implemented you should ignore the missing methods problems. Currently they show up as a problem.
The diagnostic can be configured to be ignored, or it is recommended to add a PHPDoc @method tag above the class declaration specifying your magic methods: https://manual.phpdoc.org/HTMLSmartyConverter/PHP/phpDocumentor/tutorial_tags.method.pkg.html
Although, it is a good idea, to report the problem with a lower severity since it is not an actual error in the code. We'll consider that in a future update.