Workshop does not have a similar mechanism yet. However, in this particular case, you could simply allocate existing submissions for assessment, switch the workshop to the allocation phase and enable late submissions in the workshop settings. The result will be:
- All the class can start assess the allocated work.
- The student who had not submitted their work yet would still have a chance to do so.
- You will need to check it regularly and once the last missing work is submitted, you will want to allocate it to peers for assessment.