The advanced MBOX to PST conversion software allows users to convert single or multiple MBOX files into PST format at once without file size limitations. Before starting, know that MBOX stores emails in a single file per folder, whereas Outlook uses PST files for each mailbox.  https://www.vsoftware.org/store/mbox-to-outlook-importer/

Direct import is not supported, so you’ll need either a conversion tool or an intermediate client like Thunderbird to bridge the gap