The GET/elements/api-v2/formulas/instances/{instanceId}/executions
call uses pagination in a dynamic way. The results of this API call do not represent a snapshot in time. If a formula has many executions, by the time you paginate through the last page of results, the additional executions will appear in the last page (if the results do not overcome the 200 pageSize) or there will be another nextPageToken to be used for the next page (if the results overcome the pageSize limit).