One UI 3.0 and Android 11

sure

Thank you for contacting Samsung 

kindly keep automatic update active 

You can check on Samsung Members when the update will be available on your device.

also follow up our official page 

 https://www.samsung.com/sa/

Is this support M20

Samsung new policy to give 3 generations major upgrades
Start from S10 series and Note 10 series
along with A series comes in year 2019