I'm certain if the answer is currently no, or not supported in English then that will change when the program releases in the unknown future.
That said with the possibles of having SUB PROGRAMS help to make the platform very appealing to make a mock OS for the system.
https://sup4.smilebasic.com/en/doku.php?id=reference:About_Subprograms
But I also don't have it yet, so I can't tell you for certain yes there are, or no there are not.
Any mock os on sb4
DogerizerCreated: