It says that not even custom GPUs are going to be produced. It can only mean that Apple is going to upgrade iMac with Radeon 6000 or introduce the first AS iMac soon. Feel bad for those who have bought 5700 XT seeing it being replaced so soon.
AMD RX 5700 Series Reportedly Enter EOL - No Longer Manufactured
Update, October 7th 2020: AMD has confirmed it has ceased production for the RX 5700, but that RX 5700 XT manufacturing will be ongoing at least until 1Q2021. It's unclear what this means for the company's RDNA2 launch plans; it could be speculated the company will be releasing halo products...www.techpowerup.com
I would assume this only refers to the standalone PC market GPUs, not the Navi 10 chip altogether. Because that would also imply no more Radeon Pro 5600M...