Hello,
As the complication layout is automatically selected as per the complication provider. So we don’t know which layout will be selected. For this reason, you have to set every layout size individually. For example, for your test case, you have to resize the Text layout only. But after deploying on the watch the watch battery provider provides icon and text so it will select the icon and text layout. As you have not resized the icon and text so the default size is shown on the watch.
Check my images below. I have resized the icon and text layout also which is why my text size on the watch shows 48 pixels.
You can check this thread.