Hi @benz,
I hope you are well today and thank you for your question.
Do you want to display post author name in the post meta section?
If yes then you can try achieving this by using the child theme solution posted in the following topics.
https://colorlibsupport.com/t/problems-adding-author-visible-child-theme-doesnt-work/
https://colorlibsupport.com/t/show-author-name-in-activello-template/
Best Regards,
Movin