Hi there! I am setting up a temporary landing page in the broadcast theme, using the “password” page. It isn’t using the logo I uploaded into my ‘brand’ into shopify but it just has my name - I cannot edit this (I can’t even make it all uppercase). Please let me know how I have have my logo on this page and remove my brand name 
You must add logo in Online Store > Themes > Customize > Header or Theme settings.
Best Regards,
Dan from Ryviu