I realize that Affinity Designer is designed for vector graphics, however, it seems to me that many people do such works as leaflets etc. Therefore, text breaking is an option that would be very helpful for longer blocks of text.
As far as I know, this option is available in Designer, and here I was probably looking for 3 hours and unfortunately, I didn't find it.
I will add that I work on a Polish dictionary.
Do you expect to add hyphenation?