With QML based applications in iOS 14 - for any Text elements that contains a space following a comma or period - the space does not appear.

Changing the text to be two spaces after a comma, then a single space does appear in v14 but appears as two spaces in v12 & v13 (ie- only the first space after a period or comma is lost).

In the screenshot below the left-hand side shows a simulation in iOS 12.1 where the spaces appear normally, the right-hand side shows a simulation in iOS 14.0 where the spaces are lost.  Not pictured - iOS 13.7 appears similar to v12.1 (correctly).

On physical hardware, the result is the same as in the simulation shown below.

import QtQuick 2.12
import QtQuick.Window 2.12
Window { 
    width: 640 
    height: 480 
    visible: true 
    title: qsTr("Hello World") 
    Text { 
        id: textID 
        text: qsTr("I, am, some. text. Here. Is a double space.") 
    } 
}