With Automation for Jira to trigger a rule due to the time that a status is being used you need to use SLAs. This work around makes creating these rules more complicated.

We would like to ask for the addition of a Time in Status trigger to the Automation for Jira.
This trigger exists in Legacy Automation.

Workaround:
With the scheduled trigger you can use a JQL query to limit the actions to a set of issues which comply with your requirements.

This is a sample query that you can adapt to your needs:
status = "Waiting for customer" AND status was "Waiting for Customer" before -7d