In the form designer for Power Apps model-driven app (or Dynamics 365 app),
there is no way to add some styling to the labels of the controls (field, tab,
section, grid, etc.). But if you want to emphasise some of the words in your
label, you can achieve some limited formatting by using the Unicode version of bold/italic characters. You may also add some emojis
like emoji Meg.
Search something like “bold text generator” or “italic text generator” in your
favourite search engine and enter one of those tools (e.g.
yaytext). Enter
the text that you want to style and copy the version that you like.
Paste it to the label input of the control in the form designer.
Original Post http://linnzawwin.blogspot.com/2022/09/formatting-section-or-field-label-as.html