On its security update webpage, Samsung states, “At Samsung, we take security and privacy issues very seriously and we are doing our best to respond as quickly as possible.
Securing your device and maintaining the trust you place in us is our top priority. And select devices launched in 2019 or later will be supported with firmware security updates for a minimum of four (4) years following their global launch…Monthly, quarterly and biannual firmware security updates will include patches for Android OS related security issues released by Google, as well as, patches for Samsung-specific security issues.”
Samsung makes revisions to its upgrade schedule for certain Android devices
The most recent Android security update is dated April 2021 and it should be rolling out to your compatible Samsung device soon.