iPadOS 18
Import passwords from another password manager into Passwords on iPad
In iPadOS 18.2 or later, you can import passwords that you’ve exported to a CSV file from another password manager.
WARNING: Your imported passwords might not be encrypted and could be visible to anyone who can access the file.

Go to Settings
> Apps > Safari.
Below History and Website Data, tap Import.
Tap Choose File, then choose the CSV file you exported from your other password manager.
Tap Import to Safari.
Tap Done.
WARNING: For security, delete the file you imported from.