> With Apple's keychain, and I suspect other companies' solutions, passkeys are connected to your account and at best synced between devices from the same manufacturer.
iCloud Keychain/Passwords works on macOS and Windows, and there are extensions for Chrome and Edge. I don't know whether it works with passkeys though.
> But even with Apple, I can't sync stuff between my personal and work computer because they use different Apple IDs, even though the underlying true identity (me) is the same.
As I understand it, Apple's BYOD support allows you to have a managed/corporate Apple ID and a personal Apple ID on the same device. You can also add a managed Apple ID to a personal device like an iPhone; on iOS (and possibly macOS?) it isolates the data between them so that corporate apps can't access personal data and vice-versa.
I believe it's possible to have multiple accounts with separate Apple IDs, and I think it is possible to add "secondary" Apple IDs to a single account, but I don't have experience with this.
iCloud Keychain/Passwords works on macOS and Windows, and there are extensions for Chrome and Edge. I don't know whether it works with passkeys though.
> But even with Apple, I can't sync stuff between my personal and work computer because they use different Apple IDs, even though the underlying true identity (me) is the same.
As I understand it, Apple's BYOD support allows you to have a managed/corporate Apple ID and a personal Apple ID on the same device. You can also add a managed Apple ID to a personal device like an iPhone; on iOS (and possibly macOS?) it isolates the data between them so that corporate apps can't access personal data and vice-versa.
I believe it's possible to have multiple accounts with separate Apple IDs, and I think it is possible to add "secondary" Apple IDs to a single account, but I don't have experience with this.