Arch tents like the Moment, Rainbow, and Double Rainbow can not be set up without that pole, and there's no room in the pole sleeve for a repair sleeve.
Thanks Bob, you gave me something to do…
OK not ideal but something can be done.
Worst case scenario, you forgot your pole.
You can set it up like this* :


You have the pole , have broken a section or two and do not have any way of fixing it (why not ???) :


The above shot is simulating two broken sections. Note that I have folded in the last two sections on one side inside that sleeve.
This may answer the 'there is no room…" bit.
So if you do have some tape and a larger pole section to insert over the broken one or just a couple of thin Ti pegs , you can repair that pole..
*This is much easier to do and would look a lot better on a Rainbow and in particular the DR because of the cross strut and grommets at the end of those