The Lenovo Flex 5 is back for under US$600. Available on Amazon, the device comes with an AMD Ryzen 5 4500U APU, a Radeon RX Vega 6 GPU, 16 GB of dual-channel DDR4-3200 RAM and a 256 GB SSD. An Active Pen is included in the box, too.
https://www.notebookcheck.net/The-Lenovo-Flex-5-with-an-AMD-Ryzen-5-4500U-and-16-GB-of-RAM-is-purchasable-again-for-US-599-99.479002.0.html