Professional plus edition includes access. Generally, office 2019 professional plus includes more advanced features than the standard edition, for example:
archive email right from outlook, and exchange data loss prevention
scan spreadsheets for errors and inconsistencies with inquire in excel & power pivot
integration with windows rights management services (rms) for windows server
site mailboxes: access project-related email in exchange and documents in sharepoint, all from within outlook
and many more.