Exporting admin created appointments with tax is wrong

To reproduce (4.18), set the WC prices including tax. Then book a product with 10€ from fronted and admin. Both look the same i edit-order. But when you export them via the “Appointments → Export” feature, the one created in admin has the price without tax, but the one created on the frontend has the 10€ (with tax) as expected. Reported here.