The problem with that solution is that it breaks as soon as you use dynamic data with varying number of characters.
For a group to not expand if a text element inside it is not tall enough (in bubble speak) the text element has to already be the maximum height required for any length of text (to give it room to expand inside it’s own element) or be allowed to “cut off content”
Having the ability to center inside its own element is the functionality needed for that to work. And that piece is what’s currently missing in bubble.
group 1. - Set up as your example, works great with known # of characters.
group 2. - Set up as your example, but with more characters, expanding the element
group 3. - Text element using the same size as the parent group, No longer expanding the element, but text is no longer vertically centred within the group.