Yes, looked at that, but it doesn’t obfuscates (daft word) the label. This is OK if you want to use a button that says “call me”, but if you want the number to be visible, as in, use the number as the label, it’s not obfuscated (daft word).
EDIT: I need to clarify something in the above comment, as it’s actually wrong…
If you opt to use the email address applied to the button as the label then the stack WILL obfuscate it.
If you use the telephone option, it will also obfuscate but, but then there is no spaces in the number, which isn’t very user friendly.
If you select to use a custom label and put the phone number in there, it’s not obfuscated.