Hello,
Due to the Header Overlap style, it might be happening on the categories pages and shop page.
Navigate to WoodMart > Header builder > edit default header (highlighted star icon), or you can go through the admin bar directly https://prnt.sc/Ct9ehRDvvDV9
Click on the Settings button and disable the Make it overlap option https://prnt.sc/t9tDLt8KWk82 > https://prnt.sc/1p60FbT7tCPP
If you want to disable the overlap only on the shop page. Please try creating a new header and disabling the header overlap, and setting it as the Custom header for the shop page.
You can read our detailed documentation for further help: https://xtemos.com/docs/woodmart/options-for-pages/
If you have any questions, feel free to contact us.
Best Regards,