Hi there. I noticed that when you connect a Text Input Box to a content collection and set the field type to 'Read only', there is no option to change the design of the text box, specifically the text font color, the background color and the border color. By default, the border and text color is set to grey and there is no option that lets you change it. In the design panel, you can change the colors for Regular, Hover, Focus and Error. But there is no option to change the colors for Read only mode. This grey-by-default text is barely visible on the white background.
Here's a screenshot of how the Text Input Box appears when set to Read only: