Batch processing multiple projects

I have multiple audacity projects in one directory and would like to process them at once. For example: I have 20 projects in one directory. Each project contains several markers init. I want to run some batch that will automatically open each project, do multiple export to MP3 (according markers in the project) and will continue with next project - and this way will process all projects in the directory. Does exist a way how to do it?

Audacity’s batch processing is for batches of audio files, not batches of projects.
An Audacity Macro runs inside the current project, so there is no way for it to control other projects.

A possible workaround would be to use a 3rd party automation app, such as “AutoHotkey”.