Can I be able to upload translations from VS Code to Crowdin? Like it can be done in for example Github, when you upload translations from repository to Crowdin.
There is no such possibility. Only uploading sources, downloading sources and downloading translations.
That config that you’ve used for VS Code setup is also suitable for Crowdin CLI, so you can use it to upload existing translations.
You can also upload sources via drag-n-drop option in the UI and these translations will be synchronised with VS Code after that.