daisy chain monitors

These cables are switching hard against the physical limits of how fast you can switch Digital Logic. There is no way to get three displays on any cable.

On a Mac, its one display per cable, except:

Up to two displays on a genuine ThunderBolt cable connected to a genuine ThunderBolt device (Dock or Display) whose other connectors for a second display if desired can be any of ThunderBolt, USB-C, DisplayPort, or HDMI.

USB-C to the first device will not chain any farther on a Mac.

That would normally be the case. But the Mac Pro 2013 has only ThunderBolt-2 connectors (20 Gbits/sec), which have only half the maximum bandwidth of ThunderBolt-3 40 Gbits/sec).

ThunderBot-2 is now 'old' technology. You will have a very hard time finding a ThunderBolt-2 device (Dock or Display) to attach.

Depending on what display(s) you want to connect, daisy-chaining might have too much data to fit. In addition, large displays that are 'common' today did not exist when that Mac was designed.

Your Mac supports up to six displays, but you may be forced to use one display to a cable.