Sorry to be a pain but some of your modules are new to me
How do you add the "read more" after the introduction text in your modules to show the rest of the article

I have added a different module (content slider) below yours to show what I mean - see ardaltest.cloudaccess.host/index.php

Joomla 4

Surfing template

Thanks

You can set it in the slides:

I added this - see attachedNothing changed

You must also change the text.
You still see "read more".
Go to the line and type in the label you want to appear.

Still confused

Are you saying I add "Read More" as per the attachment

I think we're talking at cross purposes.
If the line where "read more" is now not entered, the text "read more" is automatically set and displayed in the button. If you want the text to be different, you just have to overwrite it in the line. A separate button class in the HTML text is not required at all.