We are using SharePoint Online site where we have one library is created and in that we have 4 column which are multiple line text. While editing any record out of 4, 2 columns give a button to edit the value in enhanced rich text, but rest 2 columns doesn't give an option of edit button.
Any chance that the 2 columns that allow rich text editing are being pulled in from a Content Type? From a modern SPO Library, there's no option to make a multi-line w/rich text, but you can create a Content Type for Documents that does.
