As indicated in How to submit a summary to IYNC2022? the author needs to follow a two-step submission: submitting an abstract first. Then, once the abstract is accepted, submit a summary to the assigned technical track. Note that the Call for Summaries section will appear only after your abstract has been accepted.
The main purpose of the abstract is to provide sufficient information about the contribution in order to have the contribution assigned to the appropriate technical track. The abstract should not exceed 300 words.
Since the deadline for the summary submission is September 14, 2022, and the abstract needs up to two days to be assigned to the relevant technical track, the abstract should be submitted by September 12, 2022.