Custom View for Self-sizing cell

MyCustomCell.swift

import UIKit

class MyCustomCell: UICollectionViewCell {
    
    // mainView is my custom parent view, that contains every other component of the cell
    @IBOutlet weak var mainView: UIView!
        
    override func awakeFromNib() {
        super.awakeFromNib()
        
        // Add width constraint if you want dynamic height
        mainView.translatesAutoresizingMaskIntoConstraints = false
        mainView.widthAnchor.constraint(equalToConstant: UIScreen.main.bounds.size.width - 40).isActive = true
    }
}