Hey,
Android only allows contact imports from VCF/vCard files. Therefore, the most productive method is to utilize a proper PST to VCF converter that keeps the details intact. CSV files and online converters are prone to splitting large contact lists; however, vCard files remain well-organized and tidy.
The components of my solution were
Loading my Outlook PST file into a converter
Checking all contacts with the help of a preview panel
Choosing the Convert PST to vCard option to create a universal VCF file
Uploading that VCF file to Google Contacts will automatically sync with Android.
I employed WholeClear PST to VCF Converter, and it handled every part perfectly, including country codes, email addresses, home/office numbers, and so on. In case you are looking for a trustworthy
PST to vCard converter, this method would be the most secure one for Android users.