Hi @raken,
I hope you are well today and thank you for your question.
Could you please try using the CSS solutions posted in the following topics?
https://colorlibsupport.com/t/difficulty-with-read-more-summary-at-the-end-of-a-new-post/
https://colorlibsupport.com/t/read-more-tag-doesent-work/
Best Regards,
Movin