For bulk email migration, I would consider using PCDOTS EML Converter Software. It is designed to handle multiple EML files in one go, which can save a lot of time compared with opening and converting each email separately.
You can add a folder containing the EML files, select the required conversion format such as PST, and start the conversion. It can also be useful when you need to move a large collection of EML emails to Outlook while keeping the email content and attachments together.
If you have a large number of EML files to migrate, using a dedicated converter like PCDOTS can be much more convenient than doing the process manually.
To know about software, visit here: https://pcdots.com/eml-converter.html