Maybe I'm overlooking something, but I'm having to explicitly do the following to get storeValue working in combination with the useForm().itemProps. It would be rad if this could be worked into the useForm API so that it's not necessary!
<Form.Checkbox
label="Copilot"
storeValue
{...itemProps.copilot}
// force this to be an uncontrolled input
// so the stored value is respected
value={undefined}
/>