The Flex 5G is Lenovo's premium 2-in-1 with the Snapdragon 8cx platform that allows it the same standalone connectivity as most 2020 flagship phones. It has been on sale in the US before; however, those units were locked to the Verizon UW bands. The OEM now sells SKUs that may be used on any network.
https://www.notebookcheck.net/Lenovo-releases-the-Flex-5G-to-the-US-market-via-its-own-site.494475.0.html