PHP Static Analysis (PhpStan) - There is a very limited amount of options but this is a good one because it automatically detects projects phpstan.neon file and works without any further config.
php cs fixer - PHP CS Fixer extension for VS Code, php formatter, php code beautify tool, format HTML (Note: requires some set up, please read documentation of the plugin)
GraphQL - GraphQL extension for VSCode adds syntax highlighting, validation, and language features like go to definition, hover information and autocompletion for graphql projects. This extension also works with queries annotated with gql tag.
Apollo GraphQL - Rich editor support for GraphQL client and server development that seamlessly integrates with the Apollo platform
ESLint - Integrates ESLint JavaScript into VS Code.