Issue symptoms
Not all my custom field options are displayed in my report. I created a new custom field, but in Explore I cannot locate an attribute associated with the field.
Resolution steps
For a custom field to be accessible in Explore as an attribute or metric, the update needs to be synced with Explore, which happens on an hourly or daily basis depending on the plan.
In case field values were amended, you could report on tags as a workaround.
Finally, don't delete the ticket field in the meantime, as its data is not recoverable. Deleting a ticket field removes it from reports and dashboards.
For more information, see these resources: