Unable to provision Ubuntu 20.04(focal image) onto a machine on v2.4.2

The version of MAAS we are using is v2.4.2.
I have selected the Ubuntu 18.04, and focal images to be synced daily, through the Images tab.
The problem we are facing is that, we are unable to deploy Ubuntu 20.04/Ubuntu 18.04 on any machine during the deploy phase.
While, checking if the above mentioned images are selected to be available for Deploy:

The Ubuntu 18.04 and Ubuntu 20.04 images which were previously synced daily using the Images tab, does not appear in the drop down menu while selecting the Default OS and Minimum kernel versions for the Deploy step(In the general configuration (Settings -> Configuration -> Deploy).

Is v2.4.2 of Maas compatible to be able to provision Ubuntu 18.04 and > images?
Or is there any bug that is preventing this?