ios – Unable to Set Background Coloration for UISegmentedControl in UIKit

I am attempting to customise the background coloration of a UISegmentedControl in UIKit, but it surely’s not working as anticipated. The background stays unchanged even after setting backgroundColor explicitly.

code :

func customizeSegmentControl() {
    // Set customized font and textual content coloration for regular & chosen states
    let font = ThemeFont.splineRegular(dimension: 12)
    let normalAttributes: [NSAttributedString.Key: Any] = [
        .foregroundColor: ThemeColor.textBlackLight, // Text color for normal state
        .font: font
    ]
    let selectedAttributes: [NSAttributedString.Key: Any] = [
        .foregroundColor: ThemeColor.textBlack, // Text color for selected state
        .font: font
    ]
    
    segmentListType.setTitleTextAttributes(normalAttributes, for: .regular)
    segmentListType.setTitleTextAttributes(selectedAttributes, for: .chosen)
    
    // Set customized background coloration for the entire segmented management
    segmentListType.backgroundColor = .white
    UISegmentedControl.look().backgroundColor = .white

    // Set customized tint coloration (for older iOS variations)
    segmentListType.tintColor = ThemeColor.bgColor
    
    // Set chosen section coloration
    if #accessible(iOS 13.0, *) {
        segmentListType.selectedSegmentTintColor = ThemeColor.bgColor
    }
    
    // Customise border (optionally available)
    segmentListType.layer.borderColor = UIColor.clear.cgColor
    segmentListType.layer.borderWidth = 1
    segmentListType.layer.cornerRadius = 6
    segmentListType.clipsToBounds = true
}

Challenge:
The background coloration of the UISegmentedControl doesn’t change.

backgroundColor and UISegmentedControl.look().backgroundColor do not appear to work.

selectedSegmentTintColor works high quality, however the unselected background stays the default.

What I Tried:
Setting segmentListType.backgroundColor = .white

Utilizing UISegmentedControl.look().backgroundColor = .white

Guaranteeing that the segmentListType is added to the view appropriately

what consequence I received

what I need