Why is there a time delay between the time an email was actually sent from a domain and when the relevant entries are displayed on the PowerDMARC dashboard?
The reason behind this is due to DMARC RUA reports being sent by mail receivers to PowerDMARC at midnight 12:00am UTC, covering the data of the previous day. For example, at 12:00am UTC 21/09/2020, the data of 20/09/2020 will be sent and will therefore start getting displayed on your PowerDMARC account.