Similar to what is raised here - https://community.atlassian.com/t5/Jira-Service-Management/Confused-by-the-way-service-desk-displays-SLA-timers/qaq-p/138637

My team has brought up how it's confusing that the SLA display shows you how much time is left in the SLA rather than how much time it took to meet the criteria.

For example:

This ticket was responded to in 31 minutes but at a glance it appears as though it took 7 hours and 29 minutes.