Yes, SirBlain,
You'll find in my later posts (possibly in this thread?) I've indicated that if Microsoft isn't going to provide a local interface for managing passkeys with Windows 10, they should simply drop them there altogether, since as you stated, the lack of information about these makes them basically nonfunctional for that operating system version, even for relatively skilled users like me.
I agree that better information is required, but that's really all part of any good visual interface, since it should inherently lead you through the process step-by-step, with options to either learn more or even skip the process altogether at each critical point, none of which most of the handful of dialogs I ran into with Windows 10 ever actually did.
Even the Google Android interface that prompted me to create a passkey on the device itself never told me where this would actually be stored, which is one of the most confusing aspects of passkeys since they can be flexibly created on either the current device when that's supported as with Windows 11, or instead on a second device like a smartphone when that supports them, along with having Bluetooth enabled on both devices to allow them to confirm they're in close proximity and thus not being remotely controlled by malware.
All of these capabilities make passkeys both versatile and relatively easy to migrate copies from one device to another, but that's also where the greatest confusion comes in, since it requires a person to understand a virtual concept that's only typically handled by highly skilled members of IT or other engineers capable of visualization.
Unfortunately, I know these are the types of people who initially created and tested passkeys, while instead of using a pilot group of everyday users in at least something like a large corporation to confirm the core interfaces made simple sense, they just threw them out into the public realm with no real warning built-in to understand what you're getting into.
What I finally realized they should have done is begun with only the local passkeys creation concept with any new user and built from there, since understanding these invisible virtual objects on your local device is necessary to build the potential for using them cross-device.
This also implies that the Windows 10 scenario should have never existed, since if they can't support them locally, they're functionally useless for most anyone without a smartphone anyway and having this pop up out of nowhere is massively confusing, while most less capable consumers likely have this older operating system. Since many of these will get replaced over the next year, bringing in the passkey concept with the new OS and local passkeys based on Windows Hello would fit quite well, with only a local interface required unless and until the device owner/user specifically requests this next step of making their smartphone a mobile carrier for use with other devices.
You'll note this avoids the need for the popup choice of device selection initially as well, so the only thing the local device requires the user to learn is how to create and use the passkey itself for a website, which is quite enough of a concept to learn as you've implied.
Creating the initial Login.Microsoft.com passkey with Windows Hello isn't truly a problem, but throwing a popup without any prior explanation obviously is, especially if it's not obvious how to bypass it until someone has the time to spend to learn its proper use.
I actually meant most of the above with my earlier interface comment, but to the average person who's never programmed one themselves as I had quite early in my career, that seems like an oversimplification. The interface I created allowed a user to control an early LED sign used for marketing or other information display based on key combinations printed on the back of the included flat-panel keyboard, with hints printed above the keys on the front. Most people could manage basic use without ever reading a manual, which was good since the company took nearly a year to get one printed.
So yes, I fully understand what you're saying, I just see this from a different point of view. But rather than having someone like me on the team that developed and released the passkeys, I'm betting they were basically all developers who hadn't ever been required to get in front of a group of their customers like I had as a network administrator in an educational institution for several years. Though in truth, that LED signage interface came earlier in my career and used some of the everyday people from all levels working in that same company for testing, with the only initial aid being to point out the quick-start user manual printed on the back of the keyboard.
Rob