Honeydewordont Said:
"Where are my passwords??: Just got an iPhone 12. Bought it from an Apple store and they kindly transferred all my info. Or so I thought. Non of my online passwords carried over? I have probably 100 saved passwords. How do I get them back?"
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Transferring Items to New iPhone:
A. Use Quick Start:
If things were unsuccessfully transferred 100%, then try it once more. QuickStart is what to use here: Use Quick Start to Transfer Data to a New iPhone or iPad - Apple Support
B. Use iCloud Keychain:
Go here: If iCloud Keychain won't Turn on or Sync - Apple Support