HI,

listen: “Then the issue is your theme — something in your theme is blocking the button from showing up

I’ll have a quick look at the mini cart etc to see if there are any console errors etc that stand out to me, and that you can take to your theme author”

Just contacted Woocommerce and we tested together with other theme and it works with all on mini cart

Then, the problem is a conflict with your theme and I ask you to fix it, as Express paypal is something important to have.