Just adding to the previous answers, you can see here how:
https://docs.plesk.com/en-US/obsidian/customer-guide/scheduling-tasks.65207/
And you have to set the command to run the cron file
https://docs.plesk.com/en-US/obsidian/customer-guide/scheduling-tasks.65207/
And you have to set the command to run the cron file