ChatGPT sources showed online directory Yell as a source for branded search

Now ChatGPT have their own search, I thought I’d do a branded search for our own company. I quite liked what came back, accurate and thorough. Lots of succinct info, along with key projects and testimonials. All our core contact info was there. I found it notable that the sources it chose (we’re in the uk) were our own site and Yell. Is it time to revisit optimising (reputable) directory channels like Yell? I mean, I know we should anyway, but in reality we’ve not treated them as a priority.