it depends what is the field feedback_required, I am guessing in your table your feedback_required is an integer right? So if it's 0 then feedback is false / not required or if it's 1 then feedback is required / true. Or your feedback_required is a boolean and not integer. I am giving both examples here:
<div class="custom-control custom-switch">
<input type="checkbox" class="custom-control-input" id="switch1" name="example">
<label class="custom-control-label" for="switch1">Check if you require feedback</label>
<%= f.check_box :feedback_required, class:"custom-control-input",
id: "busy-mode-toggle",
checked: current_user.feedback_required ? true : false,
type: "checkbox" %>
</div>
This part here checked: current_user.feedback_required ? true : false
it really depends on the association of your feedback_required field, is it in the user table, or projects table? You have adjust it accordingly. I used current_user as an example, but yours might be project.feedback_required ? true : false
Or you may be looping through an object that you defined already something like:
x.feedback_required ? true : false