@Peter-Schiefer Thank you for your insight.
Personally, I see plenty of room to implement the requested feature either on the right side or at the bottom:

But even if it is not possible to add a new info widget for whichever the reasons, I would personally trade one of the current info widgets. For instance, showing the Estimated Time of Arrival AND the remaining time, at the same time, is redundant in my opinion. I would gladly swap one of those for the elevation (or any other at the choice of the user).
I too used a Garmin sat navigation device for years and I loved being able to choose which info blocks to have available. And elevation was definitely always on for me. I really cannot see why MyRoute-app cannot, or should not, offer the user the possibility to choose among the options most useful for each user.
I understand that this may not be a very popular request. But, being a "suggestion forum", I believe I am entitled to make mine. If fact, I am just supporting another user's request.
Thank you for your time.
Regards,