Passkey not working on PayPal

I created a Passkey for PayPal today.  I thought that I already had one, but it didn't show up when I visited the website.  So I attempted to create a new Passkey using my Mac and Safari.  For the most part, the setup process seemed to work.  Under Manage Passkeys, I could see something like 'macOS Safari'.  I closed that popup window, and then I clicked on Manage Passkeys a second time, with the hope of adding a Passkey for my iPhone from this Passkey screen on my Mac.  That didn't work.  I ended up with two Mac Passkeys for PayPal.  So I deleted one of them.  

Now I see no Passkeys when I visit the PayPal site via a browser on my Mac.   I see a Passkey in the 1Password browser popup, but clicking on it does nothing.  On my iPhone, in 1Password, I also see that I have a Passkey for PayPal.  But when I visit the PayPal site using my iPhone, it says, You removed this passkey from PaPal.  Log in another way.'  

So I deleted the Passkey in 1Password and in PayPal.  Then I created a new Passkey.  The PayPal site now shows that I have one Passkey, which it labels 'macOS Safari'.  

I still get no prompt to enter my Passcode in my Mac browser when I try to log in on the PayPal site.  I still get the 'You removed this passkey...' message on my iPhone.  

I've been through most of the steps in this cycle three times.  I have deleted everything related to PayPal Passkeys, readded on, restarted my iPhone, and tried two different browsers on my Mac.  Nothing has worked to log into PayPal with a Passkey.  (I haven't restarted my Mac, because I have been adding to this message as I try different experiments, over the last hour or so.). 

Do you have any advice?  

PS.  Does 'Passage' mean anything other than this confusingly-named Community Discussion division?  On some of your pages, it is implied that the word means more in the 1Password Passkey world, but on other pages, it doesn't.