Why is the PWA app icon not showing on IOS?

Question

Icons

Hello!

I am developing PWA (Progressive Web Apps) for my website. The essence of the application is that when you enter the application, it displays the site page in full screen mode (like a real application).

At the moment the application is working fine, but there is one problem. When installing an application on an iphone , the application icon is not displayed, but instead a small part of the site is displayed (that is, in fact, the application does not have an icon that should be). By the way , on all other operating systems (Android, Linux, Windows, Mac Os) everything works well and the icon is displayed as needed. The manifest is responsible for displaying the icon and some other parameters (the paths to the icons are correct).
Here is the application manifest:

{
  "name": "name",
  "short_name": "name",
  "description":"Answer,please",
  
  "theme_color": "white",
  "background_color": "white",
  
  "display": "standalone",
  "start_url": ".",

      "icons": [
    {
      "src": "test/icon-192x192.png",
      "sizes": "192x192",
      "type": "image/png"
    },
    {
      "src": "test/icon-512x512.png",
      "sizes": "512x512",
      "type": "image/png"
    },
    {
      "src": "test/m/Micon-192x192.png",
      "sizes": "192x192",
      "purpose": "maskable",
      "type": "image/png"
    },
    {
      "src": "test/m/Micon-512x512.png",
      "sizes": "512x512",
      "purpose": "maskable",
      "type": "image/png"
    }
  ]
}