Just a little note. When will Venmo appear?
Venmo will appear on mobile devices when an attendee has the Venmo mobile app installed and when merchant payments are enabled in the app. An attendee can enable merchant payments through the Venmo app –> Settings –> Connect Browsers and then connect the browser.
As Sam mention, Paypal commerce has the pay later but we don’t have control if it will show up or not, its all determined on PayPals side. UK and US supports it.