I haven't used them myself, but the GOV.UK components look and function great. https://govuk-components.netlify.app/
I am not a fan of Gov UK framework. For once, the banner takes up 50% of the space on my mobile browser. All design elements and controls are excessively large and bloated. Negative space is liberally applied everywhere. USWDS strikes a good balance.
The last thing you should ever want is for someone to fail to apply for welfare benefits because they were overwhelmed by the website design.
I agree that the cookie banner could be smaller though.