For any @GrapheneOS users trying to get the new #Santander app working: you need to go into the app’s settings, and tap on ‘0 verified links’ (which doesn’t have these checkboxes, it just looks greyed-out and unclickable), and then check all the boxes, and then it works!
Any nerds know if this is a Santander, #GrapheneOS or #AOSP issue? Lots of apps self-register as link handlers so I’m tempted to assume Santander, but also the grey ‘0 verified links’ thing being tappable is very confusing UI!