Hello,

First of all thanks for choosing our Theme, we are glad to be you in WoodMart WordPress family :-).

To change the logo and other elements in the mobile header you first need to select the mobile layout from WoodMart >> Header Builder >> Your current header.

Screenshot for clarification: https://jmp.sh/kRtSDZ8

Also at my end your logo shown perfectly fine in the mobile devices. Kindly clear your site and browser cache.

Screenshot : https://jmp.sh/ByuMJNj

Best Regards.