lookup issues function to be able to access the worklog smart value.
From the resulting issue list, the following issue properties are available to use (custom fields aren't available):

• {{ key}} - Returns the issue key

• {{ url}} - Returns the issue url

• {{summary}} - Returns the issue summary

• {{assignee.displayName}} -  Returns the assignee

• {{reporter.displayName}} -  Returns the reporter

• {{status }}- Returns the status

• {{issueType}} - Returns the issue type

• {{resolution}} - Returns the resolution status

• {{fixVersion}} - Returns the fix version

• {{created}} - Returns the date the issue was created

• {{updated}} - Returns the date the issue was updated

• {{Story Points}} - Returns the story points for the issue (classic Jira Software)

• {{Story point estimate}} - Returns the story points for the issue (next-gen Jira Software). Learn more about using smart values with numbers.

Refer to the article for more information: https://support.atlassian.com/jira-software-cloud/docs/automation-actions/#Automationactions-Lookupissues