21.4.0.3

• [*] Fixed an issue where publishing Posts and Pages could fail under certain conditions. [#19717]
• [*] Share extension navigation bar is no longer transparent [#19700]
• [***] You can now migrate your site content to the Jetpack app without a hitch. [#19759]
• [**] [internal] Upgrade React Native from 0.66.2 to 0.69.4 [wordpress-mobile/gutenberg-mobile#5193]
• [*] [internal] When a user migrates to the Jetpack app and allows notifications, WordPress app notifications are disabled. [#19616, #19611, #19590]
• [*] Reader now scrolls to the top if the tab bar button is tapped. [#19769]