MFMailComposeViewController() not dismissed inside UIAlertAction

I have MFMailComposeViewController opening up inside UIAlertController and the code looks like this:

import StoreKit
import MessageUI

class SettingsListViewController: UIViewController, MFMailComposeViewControllerDelegate, UINavigationControllerDelegate {
// Some code adding the UITableView and etc
// ...
}

private extension SettingsListViewController {
    
    func didSelectShareCell(shareSectionCell: ShareSectionCell, _ tableView: UITableView, cellForRowAt indexPath: IndexPath) {
        switch shareSectionCell {
        // Some other cases...
        case .rate:
            let actionSheet = UIAlertController(title: "Feedback", message: "Are you enjoing the app?", preferredStyle: .alert)
            
            actionSheet.addAction(UIAlertAction(title: "Dismiss", style: .cancel, handler: nil))
            
            actionSheet.addAction(UIAlertAction(title: "Yes, i love it", style: .default, handler: { action in
                SKStoreReviewController.requestReview()
            }))
            
            actionSheet.addAction(UIAlertAction(title: "No, this sucks", style: .default, handler: { action in
                guard MFMailComposeViewController.canSendMail() else {
                    // Alert info user
                    return
                }
                
                let composer = MFMailComposeViewController()
                composer.mailComposeDelegate = self
                composer.delegate = self
                composer.setToRecipients(["my mail"])
                composer.setSubject("i'm mad")
                composer.setMessageBody("Hey, i love your app but...", isHTML: false)
                
                self.present(composer, animated: true)
                
                func mailComposeController(_ controller: MFMailComposeViewController,
                                           didFinishWith result: MFMailComposeResult, error: Error?) {
                    self.dismiss(animated: true)
                }
                         
            }))
            
            present(actionSheet, animated: true)
            
        }
    }  
}

Everything works fine. Send mail window opens up, the mail being sent too and stuff but when it comes to pressing 'cancel' & 'send' buttons MFMailComposeViewController() isn't dismissed (have to swipe it down in order to dismiss it)

What can be wrong?

Put this delegate outside the function and inside the controller class. Also, dismiss like this controller.dismiss(animated: true)

private extension SettingsListViewController {
 func mailComposeController(_ controller: MFMailComposeViewController,
                               didFinishWith result: MFMailComposeResult, error: Error?) {
        controller.dismiss(animated: true)
    }
}