Welcome to the community, @Panagiotis_Kotsadam!
You can add superscripts to single-line text fields, long text fields, single-select fields, and multi-select fields.
Just type the ™ like you would type it in any other application.
Hope this helps! If this answers your question, could you please mark this comment as the solution to your question? This will help other people who have a similar question. :slightly_smiling_face: