Graham Hancock is brilliant at muddying the waters (saying this as someone who used to read everything he put out - i was enthralled at the mystery of an ancient civilisation that gave birth to all the rest, but nothing over the last 30 years has been substantiated and he loves working the underdog/anti-consensus angle so in my opinion that’s his entire bent, he revels in casting aspersions on well established archeological convention) so I’m not too sure about that, this post suggests it’s still being excavated [0]

Interestingly, there have been some recent excavations that suggest there are some sites that may be even older [1]

[0] https://www.thetravel.com/gobekli-tepe-still-being-excavated... [1] https://www.aa.com.tr/en/culture/ancient-site-older-than-gob...