I had created an extra field for context which adds the context (file location to all the headers in succession) and this text is semi-transparent. If in any card, I don’t understand the context, I just hover over that context and it shows itself. If I am able to understand fine, else I have another field with Obsidian link which leads me to the note itself in obsidian (if on mobile I would simply flag them for later review on laptop).
I mostly make sure I have enough context in the cards and I have my decks according to different papers too.
As for app on mobile, I tried a lot of options, I was able to have notes on both iPad and android but viewing it satisfactorily was missing. SInce, clicking on a link was almost never available, but yes, we could open any file and view it via search (no wiki links though)