tableView.dequeueReusableHeaderFooterView(withIdentifier: ) crashes on iPad only

I have created a custom class:

class TarifsHeaderFooterView: UITableViewHeaderFooterView { …}

With its init:

override init(reuseIdentifier: String?) {      
        super.init(reuseIdentifier: reuseIdentifier)
        configureContents()
}

I register the custom header view in viewDidLoad of the class using the tableView. Table delegate and data source are defined in storyboard.

tarifsTableView.register(TarifsHeaderFooterView.self, forHeaderFooterViewReuseIdentifier: headerTarifsIdentifier)

And call it:

    func tableView(_ tableView: UITableView, viewForHeaderInSection section: Int) -> UIView? {
        
        let view = tableView.dequeueReusableHeaderFooterView(withIdentifier: headerTarifsIdentifier) as! TarifsHeaderFooterView

That works on iPhone (simulators and devices).

But it crashes on any iPad simulator, as tableView.dequeueReusableHeaderFooterView(withIdentifier: headerTarifsIdentifier) is found nil.

What difference between iPhone and iPad do I miss that explains this crash ?

PS: sorry for the messy message. It looks like the new "feature" of the forum to put a Copy code button on the code parts, causes the code sections to be put at the very end of the post, not at the place they should be.