The current Wikidata attribution is a long (sometimes very long) list of item IDs.
E.g. from https://en.wikivoyage.org/wiki/Prague :
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It's hard to see how this is useful for anyone. It also ends up getting heavily truncated so you don't even see all this even in the expanded view.
If anything, these should use the item label (e.g. "Old Town", instead of Q748211) to at least be readable. However, that would still be a very long list.
Wikidata items and properties are public domain (CC0), so there is no requirement to include prominent (or any) attribution.
A reasonable middle ground might be something like:
"Wikimedia maps | Map data © OpenStreetMap contributors | Also includes Wikidata data"
Optionally, if you click Wikidata, it could provide a more detailed list of the data used (if actually relevant).