@Johnpigg 

Can you be specific about what kind of data you would like to see?

In the current design, illustrated by the Month chart for instance, clicking on a specific day's data (represented by a column) reveals the highest and lowest temperature as well as humidity for that day. In my view, this presents the necessary information effectively.

Given the fixed time intervals in the data table, and their relatively coarse granularity—unlike camera footage, which can be accurate to the second or even millisecond—the Day chart displays data every fifteen minutes, while the Month and Year Charts present the highest and lowest data for each day/month. Consequently, navigating by clicking on a data column and sliding left or right on the screen allows for quick access to the desired data. Therefore, the addition of a zoom slider may not significantly enhance data viewing in this scenario. 

  @Johnpigg 

Thank you for the explanation, I see your point. BTW, I'm wondering how govee's month view is displayed by default?

Is it the same as on the image, showing 4 days of data, with drag left and right to see the data for each day of the month? Or can you show the whole month's data at once by zooming?