Apple's latest update to the Windows iCloud app includes the ability to manage your passwords in your keychain.
Complete Guide to Apple Passwords
iCloud for Windows has allowed users to access their photos, drives, mail, contacts, calendars, and bookmarks across devices for some time now. With this new 12.5 update, you can now also manage passwords directly in your iCloud Keychain. Granted, syncing and managing passwords across multiple devices isn’t a new concept, but this does make the transition from macOS/iOS to PC easier.
Once you download the update, you will have the ability to search, edit, copy, paste, add, or delete the passwords you have saved. You can also set up and manage additional Keychain accounts for individual users.
Passwords can then be synced between your devices using a Microsoft Edge or Google Chrome extension. This allows you to autofill your passwords on your Windows and iOS devices, as long as they all have access to your iCloud Keychain.