PayPal has added £2 postage to my online course

-- HikaShop version -- : 4.4.5
-- Joomla version -- : 4.0.6
-- PHP version -- : 7.4
-- Browser(s) name and version -- : Firefox 96.0.1 (64bit)
-- Error-message(debug-mod must be tuned on) -- : No error message.

Hello,
PayPal has started adding £2 postage to my online course (a virtual product) although it's not showing up in the Hikashop cart . The 'new order' and 'payment notification' emails from (HS/you) don't show the postage charge, it only appears on the 'notification of payment received' email from PayPal.
I just rebuilt my site as Joomla 4 using the latest version of Hikashop. I went through all the pages and chose all the same settings as the previous build (my Joomla 3 site) but PayPal never added a postage charge before. Has something changed, or am I missing something? Previously I had no shipping methods set and I don't in the new set up either.

Attachment 1: PayPal receipt before latest build.
Attachment 2: PayPal now charging £2 postage and packing.

I hope you can help solve this mystery.
Thanks, David

Thank you! Yes I found it - never seen that page before. £2.00 added to every cart.
It did however have 'Click here to allow transaction-based postage values to override the profile postage settings listed above (if profile settings are enabled).' ticked, so it had never been added to my other items which already had individual postage rates defined. So mystery solved.
Thank you!