Reviewing the JS variables on your checkout page, you appear to have the express checkout option for Apple Pay disabled. You need to go to the Apple Pay Settings page and make sure express checkout
is enabled in the Payment Sections.
Thanks
Hi @mrclayton thanks for the incredibly quick answer! I did have that disabled because I thought it was then possible to get it to show under the Universal Payment (and I could really swear that was there before? And before the Universal Payment Method was a thing, it just showed as its own radio button before), so meaning as one of the choices here:

Since in Stripe payment links for example, it does render as an option, eg:

But do I interpret correctly that that is no longer possible? You were right that turning on Express Checkout puts it on the top, but I want customers having to go through the flow (accepting our rental agreement, actually choosing their pickup point, etc, all that is potentially ignored with Apple Pay)
Thanks,
Jonathan
and I could really swear that was there before?
The UPM does not support express checkout payment methods. You’re confusing how the checkout shortcode works and the new checkout block works.
The checkout block is more restrictive and so Apple Pay can only be rendered as an express checkout option when using the checkout block. If you want it to work the old way, you need to use the checkout shortcode.
I’ve made a note about supporting Apple Pay and GPay via the UPM though.
Kind Regards