Looking for a responsive theme that is compatible with WP Accessibility and can display an accessibility bar

I am working on a wordpress website that requires to display an accessibility bar as the primary audience for the website is people with various disabilities.

My client requires a wordpress theme site they can themselves update in the future.
The theme must be to be able to display an accessibility bar even if that is via a plugin.
Theme must be responsive.
The theme ideally should be accessibility-ready or definitely compatible with accessibility plugins.
The site needs to have a blog, a contact form, an events section and a section where ‘stories’ are being posted similarly to a portfolio site that showcases projects. Each story ( 12 in total ) will display a header image and text.
We are happy to buy a theme provided it comes with support.
My client is a massive fan of this website https://weareunlimited.org.uk/

does any of you have any recommendations?

That what you have write supports 97% templates on themeforest.