Hello,
First of all thanks for choosing our Theme, we are glad to be you in the WoodMart WordPress family :-)
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You need to use separate headers for each single product page and shop page and set the icons for each element from Header Builder.
To add a separate header for the shop page edit the shop page and set the custom header.
Screenshot for Clarification: https://ibb.co/tpGYhgd
For the product page you can set the header from Theme Settings >> Product Page.
Screenshot for Clarification: https://ibb.co/sFqwH16
If you want to ask anything else then provide with some relevant screenshot of the specific area to check it myself and help you out accordingly.
Best Regards.