Can't find my profile / activities / files via GeoGebra search
I've created material that I want my pupils to open using the GeoGebra Graphing App. I thought that the pupils could simply search for my name after tapping on "Open" in the app. However, when searching for my name (fischbach) nothing is found. When searching for the name or the ID (e.g. hngnyzdm) of the material nothing is found either. The same is true when using the search box on the GeoGebra website.
What do I need to do so that my pupils can find my content?
If it is not possible to find my content via the search menu: What is the easiest way to open a certain material via the app? When my pupils directly open the link https://www.geogebra.org/m/hngnyzdm the material is opened in the browser of their smartphone -- this is not what I want, as the file should be opened in the app. How to do that?
Thank you in advance!