The display is Mini DisplayPort, not Thunderbolt.
About the Apple Thunderbolt 3 (USB-C) to Thunderbolt 2 Adapter - Apple Support
"This adapter is not compatible with displays that use DisplayPort or Mini DisplayPort, such as the Apple LED Cinema Display. Thunderbolt and Thunderbolt 2 are not the same as Mini DisplayPort , though the ports have the same shape."
You need a USB-C to Mini DisplayPort adapter, such as:
https://www.uptab.com/usb-c-to-mini-displayport-adapter-4k-60hz-graphite/
This adapter has an extra USB-C port (for charging only).
You will also need a USB-C to USB-A adapter for the display's USB cable.
https://www.apple.com/shop/product/MJ1M2AM/A/usb-c-to-usb-adapter
You can charge from the display's MagSafe plug with this adapter
https://elecjet.com/products/anywatt-magsafe
Plug it into the charging port on the Uptab adapter.