The font sizes of the heading tags are not the same in each place the font sizes are changed for the heading tags according to the designs in our demo versions.
If you want to ask the font size of a specific area then provide the screenshot to check it myself and help you out accordingly.
You can take the screenshot from our demo version for the specific area in which you want to know the sizes for the heading tags to check it myself and help you out accordingly.
Or you can inspect the specific area from our demo and check the font-size used for the specific area.