To convert Maildir emails to Outlook, first use a reliable Maildir to PST converter tool. Install the software, then select your Maildir folder as the source. Choose PST as the output format and configure settings like folders and attachments. Start the conversion process. Once complete, open Microsoft Outlook and import the generated PST file via File → Open & Export → Import/Export → Import from another program or file → Outlook Data File (.pst) to access your emails.

https://www.vsoftware.org/store/maildir-email-to-outlook/