The SLA picker is very prone to confusing user experiences as it is possible to have multiple SLAs with the same name across different Jira projects. This means that a customer may configure a rule, select an SLA of the correct name and not know why the rule never triggers.
The SLA picker should only show SLAs from the projects that an automation is scoped to, additionally it should show more information about an SLA in the dropdown itself. (associated projects, ID, something that helps the user know which SLA they are picking)
This is filed as a bug instead of an improvement because it's causing support load and the user experience of this is in every way the same as a bug.