anonymous user Thanks for posting in our Q&A.
For this issue, I have done some research. I find that when we try to add a database from OneDrive, the file seems to disappear when we tap it. No worries, the database is still there. We can read the following article as a reference.
https://keepassium.com/articles/sync-ios-keepass-with-onedrive/
If there is anything unclear, feel free to let us know.
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