Text and Button elements are made much more flexible by the possibility of including variables in them. Variables are tokens (starting and ending with $) which are replaced by the value they represent when the text is actually displayed on the home screen.
As an example, $HOUR24$ is replaced with the current hour on the 24-hour clock. The text The time is: $HOUR24$:$MINUTE$ might become The time is: 12:23.
Texts containing variables are automatically updated when the variable value changes.
Zoom contains a limited set of variables, consider installing Tasker to be able to set your Zoom texts from over 75 others such as the last caller/SMS name, nearby wifi networks, current location etc.
Tasker variables are not replaced directly by Zoom and vice-versa. However, you can use Tasker to set a text element containing any variables with the Element Text action in the Zoom category.
Example: $HOUR24$:$MINUTE$: CellID: %CELLID
When Tasker sets the element text, it will replace %CELLID with the current cell tower ID. After that, Zoom will replace $HOURS24$ and $MINUTE$ before displaying the final result.
Note that Zoom will continue to update $HOURS24$ and $MINUTE$ as the time changes, but whatever replaced %CELLID will remain until Tasker again updates the element text.