Mail enabled Public Folders : After Hybrid decommissioning

Hi,

I plan to remove  Exchange 2019 Habrid server and or related object.

Management server will be left because we use  Ad connect…..

In this link is written :

Use Directory-Based Edge Blocking to reject messages sent to invalid recipients in Exchange Online

https://learn.microsoft.com/en-us/exchange/mail-flow-best-practices/use-directory-based-edge-blocking?WT.mc_id=M365-MVP-6771

DBEB is only supported for mail-enabled public folders hosted on-premises.

Does it mean, that I need to move  to shared mailboxes and disabled mail enabled public folders ?

Thank you.