macOS Big Sur / the requested os version is not available
Good evening, everyone!
I have a MacBook Pro (Retina, 13-inch, early 2013) currently installed macOS Catalina.
I want to upgrade to macOS Big Sur.
I'm trying to use "about this Mac" - "updates" says the latest software is installed on your Mac.
When I try to download through the App Store, I get "the requested os version is not available".
I can download the distribution kit from third-party links and install it in flash drives, but I'm afraid of bricks.
MacBook Pro 13″, macOS 10.15