PR to PO in AI / ML

I have a question on the applicability of AI / ML bot in a PR to PO process. Scenario 1: The buying organisation uses an ERP. How can the bot operate in the PR to PO scenario here? And provide what kind of benefit? Scenario 2: The buying organisation operates in an ‘excel’ environment. How can the bot operate in the PR to PO scenario here? And provide what kind of benefit? Thank you for your time for responses.