Connecting older Apple displays to new 2020 5K iMac
I have two 2560 x 1440 Apple displays (a Apple LED Cinema Display and a Apple Thunderbolt Display) and I want to know if they can be used as additional monitors for a 2020 5K iMac.
Question marked as
Yes you can. The 2020 5K supports two external monitors of up to 4K resolution.
The Thunderbolt display will need a Thunderbolt 3 to Thunderbolt 2 adapter. https://www.apple.com/shop/product/MMEL2AM/A/thunderbolt-3-usb-c-to-thunderbolt-2-adapter
The Cinema Display is more flexible and should work with any DisplayPort output, including simple USB-C to MiniDisplayPort cables.