Hello,

I have corrected and replaced the code, now it works. Please check.

I have added this code to the Theme Settings > Custom CSS

.tax-product_brand  .content-with-products {
   width: 100%;
   min-width: 100%;
}

.tax-product_brand .sidebar-container {
    display: none;
}

I see a separate tab with the Brands. Seems that this is a plugin. You need to create default Woocommerce attribute Brand and insert values inside as you create Color, Size etc. Then, navigate to the Theme Settings > Shop > Brands and set this attribute as I wrote above.

Best Regards