Hello,
As there are several template styles for the Wimble template and they are assigned to different menu item/pages, please make sure you are editing the right template style and checking the respective menu/page at frontend.
https://prnt.sc/d4zKvqe5lQ5N
For example if you want to change logo for your Home page and consultancy page then you are supposed to edit the 'Wimble - transparent' style of the template, as this template style has assigned to those two menu items. Here is a screenshot that will explain it better I hope:
https://prnt.sc/oJir-6y7RrTZ
Note: I have given screenshot from Joomla 3, but the functionalities are same for Joomla4 too. So no Worries:)
Best Regards