Maybe we're talking about different things, but ...
I scanned my physical card details into wallet on iOS 26. They now show in the Wallet "app" on MacOS* and they are automatically all available for autofill on Safari. Going into Safari Preferences for autofill takes you to the afore-mentioned page in System Settings.
One still needs to activate the cards for Apple Pay on the laptop if you want to use them for that.
* Well, under System Settings / Wallet & Apple Pay which Spotlight finds easily enough just by starting to type "wallet"