To see when the participants have arrived at your event, you first need to have created an "Arrival" workflow automation, with a stage name of your wish.
When the participants move to this stage, the date-time of arrival will automatically be saved in the system. It can then be displayed in the Participants list, with the "Arrival time" column.
To show this column in the Participants list, click on the gear icon at the top right of the participants list and drag and drop "arrival time" from the "Available columns" list over to the "Columns to display" list.
