If you can’t decide which software is perfect for importing MBOX to G-suite Google Workspace, then i advise you to download eSoftTools MBOX Converter Software. After google launched G-Suite Google Workspace most users are using this and they have been required to Import MBOX files into this G-Suite. You can go with software because this tool gives you 100% data migration without any kind of problem. A free demo is available where you can convert 25 files quickly and you don’t have to pay.
Know more - https://www.esofttools.com/mbox-converter.html