Why does the Walmart website want me to sign in or create an account when all I want to do is browse for merchandise available. This problem started recently, it does not happen with other browsers.
Could you try with shields off? (do so by clicking on the brave icon in the URL bar)
Also, what’s the OS?
What is the Brave version? (found at Settings → about Brave)
If on desktop / Mac, could you try in a private window or create a new profile (click on the Hamburger Menu near the top right corner)