Apple has today released iOS 13.5.1, iPadOS 13.5.1, tvOS 13.4.6, watchOS 6.2.6, and a supplemental update to macOS Catalina 10.15.5 to the public.
According to Apple's release notes for iOS 13.5.1, watchOS 6.2.6, and macOS Catalina 10.15.5 supplemental update, these updates provide "important security updates" and are recommended for all users. We did not have access to the release notes for tvOS 13.4.6 at the time of writing.
As these releases appear to be only security updates, it is unlikely that they contain any accessibility changes for blind and low vision users. However, if you do spot any improvements; regressions; or changes during your use of these releases, please do post a comment to let others know.
How to update
iOS 13.5.1 and iPadOS 13.5.1 are available via Over-the-Air Update (Settings > General > Software Update) via Finder on a Mac with macOS Catalina, or via iTunes on a PC or Mac with macOS Mojave or earlier.
Before updating, we strongly recommend making a full and complete backup of your device (either locally or in iCloud, depending on personal preference). This will ensure that, in the unlikely event that something goes wrong during the update process, you will have a current backup on hand in case a device restore becomes necessary. Also, if using OTA update, we recommend plugging your device into a power source for the duration of the download/installation process, so as to prevent the unlikely event of your battery going dead during the update.
watchOS 6.2.6 is available via Over-the-Air Update (Settings > General > Software Update) or by going to the Watch app on your iPhone and navigating to General> Software Update. To install the update, your Watch must be connected to its charger and have at least 50% battery power.
To install tvOS 13.4.5 on Apple TV 4K or Apple TV (4th generation), go to Settings > System > Software Updates and Select Update Software. If there's an update, select Download and Install. Wait for your Apple TV to download the update. Don't disconnect or unplug your Apple TV until the update completes.
macOS Catalina 10.15.5 supplemental update can be downloaded by going to System Preferences > Software Update.