Hi AnnaVarling,
Thank you for posting in this community.
Sorry that I don’t find any Harvard style not abbreviated with et al. in the text at 2+ authors.
However, according to my research, you may try the suggestions in the following third-party article do not use “et al.”:
When to use “et al.” in Harvard referencing style | EasyBib
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Or you may try the suggestions( the last three replies) in the following thread:
How do I stop Word putting "et al" in the Bibliography - Microsoft Community
Best Regards,
May