Am I correct in understanding that if you have an Android 11 device, you will still be able to use existing apps that are updated but not new applications? Unf

Am I correct in understanding that if you have an Android 11 device, you will still be able to use existing apps that are updated but not new applications? Unfortunate for devices like boox ultra or the c version which were launched this year but unlikely to ever be upgraded to 12+ probably given SOCs.