Create an option to set the size of the Timestamp in the Big Number with Trendline

What is the problem or goal the end user is trying to solve or accomplish?

There is an option to set the font size for the header and sub-header. But there is no option to set the size of the timestamp.

How are they solving it currently?

Target the size using CSS template or make the chart big enough.

What is the recommended solution by the Customer?

Create an option to set the font size.