Yesterday IBM/RedHat announced they where going to kill Centos 8 by the end of 2021. With this EOL announcement, Centos is not longer a valid option for us to install Domino. Only option is RedHat, that is expensive, and also, with a lack of confidence after that movement.
I will encourage HCL to add support, asap, to Ubuntu or other popular linux distribution.
Also, they should improve docker support, adding Sametime Community, Traveler, etc, UBI images, so we can move that UBI images on the future to any linux distribution running dockers.