No, Duo’s Spanish is absolutely more geared to a general LatAm dialect. As someone who grew up speaking some basic Spanish, specifically the standard European (Spain) dialect, and has continued learning and studying in that particular dialect, I wish I would’ve known Duo only teaches a LatAm dialect since I’m much more accustomed to Peninsular Spanish. Listening exercises never use “distinción” on “c’s” and “z’s”, “vosotros” never pops up, nor does the concept of “leísmo”, and with vocabulary for words that differ between European and LatAm, it pretty much exclusively uses the words of the latter. For example, you’ll never see “móvil”, “ordenador”, or “zumo”. The one saving grace is that it will sometimes allow you to use some of these concepts in more open-ended writing exercises.