Accessibility of consent form as a primary focus


We have the consent form setup as “large banner” on one of our clients’ account and I’m trying to improve the accessibility of the site.
Currently, during the navigation, the focus is done on the consent form as a very last stage of the page. (ie: when using the keyboard to navigate the page, the user has to browse the full page in order to validate or close the consent form)
Is there a way to activate the focus on the consent form as the 1st step of the keyboard navigation somehow?

Thank you!