I planted one about 6 years ago with the same expectations that you had, and was also disappointed. I decided to wait it out and was rewarded. If you can tough it out for another year, maybe two, you will have more pipevine growth than you know what to do with.

Think of it as a woody shrub, which is kind of what it is; like them, you don't see the major top growth until the roots have regrown and settled in. Once they have settled in, though, stand back!

Keep it watered for the first year or 2, then stand back. It is growing massive roots underground. When it does grow the first vine to about a foot, pinch the end. After this vine (one of my favorites) gets going, prune it severely in the spring if you want.

Another thing to know about Aristolochias, they do not grow down, even a little. The tips must be pointing up to keep it growing.

Here's a pic of the one I planted last fall at the base of my pergola:

That's just what mine looked like when it was new. Just wait. And keep an eye on that ivy, that it doesn't overrun the pipevine.

Wow
I have 4 sp. of pipe vines
2 from cuttings & 2 from seed

&

All have flowered within the first year or two for me

They seem to be really fast growers

Just guessing here
But maybe not enough light???

I'd guess it is more the zone 10 vs zone 6 that is making a difference. That, and that your plants started out there, and the OPs plants and mine have had to remake their roots.

I planted 2 small pipevines last fall and they started out good this spring but just kind of stopped and the bottom leaves are brown a bit ang advice