Read-only attribute not display on certain components

[Jacopops]

Describe the bug
When you add read-only attribute in the layout section it not display on components: date, radio, selectboxes, checkbox

Version/Branch
Latest

To Reproduce
Steps to reproduce the behavior:

1. Create form...
2. Add components date, radio, selectboxes, checkbox and add the attribute read-only
3. Try with textfield and word perfectly

Expected behavior
Turn gray like textfield

Screenshots

Additional context
I see when inspecting the html that the readonly attribute is not on the correct input but on another html component which is not displayed.
Red: not display
Blue: display

[lane-formio]

Is there a reason you can't just use "disabled" in the display tab?

[Jacopops]

Since I render the form with php, i check all the attributes and print them to html, with the disable control I have to check another form parameter, I use other attributes and having them all in one place is more advantageous, the only " disadvantages" is when I have to check the read-only field in the builder, I have to match all the components individually