If you want to convert MBOX to PST file, try one of the best software called eSoftTools MBOX to PST Converter, which has excellent features that allow users to easily export MBOX to Outlook and can convert multiple MBOX files into PST files without any changes in sequence, styles, email headers, or email formatting. Afterward, the PST file is an MBOX file in the UNICODE form that can be read by all versions of MS Outlook 2019, 2016, 2013, 2010, 2007, and 2003.
For more info- Convert MBOX to PST files
For more info- Convert MBOX to PST files