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Grapevines are generally tough but can be plagued with pests and diseases. Pink Iona is a European variety (Vitus vinifera). These articles should help:

https://www.gardeningknowhow.com/edible/fruits/grapes/treating-grapevine-problems.htm

https://www.gardeningknowhow.com/edible/fruits/grapes/tips-for-irrigating-grapes.htm

https://www.gardeningknowhow.com/edible/fruits/grapes/drought-tolerant-grapes.htm

https://www.gardeningknowhow.com/edible/fruits/grapes/grape-root-aphid-treatment.htm

https://www.gardeningknowhow.com/edible/fruits/grapes/how-to-fertilize-grapes.htm

https://www.gardeningknowhow.com/edible/fruits/grapes/prune-grape-vine.htm

You should be well within their USDA range, and cold shouldn't be a big issue. Just in case, this article will help:

https://www.gardeningknowhow.com/edible/fruits/grapes/grape-vine-winter-care.htm

This resembles something a little more sinister. It looks more like a disease called "sudden vine collapse". This is typically 1 or more viral infections simultaneously. This can present itself in a number of ways, including the leaves being left on the vine once dried.

Those need to be removed. After that, I would send samples of the soil to one of your closest horticultural extension services. This will help you find one:

https://www.gardeningknowhow.com/garden-how-to/info/what-is-extension-service.htm

After you find out which of the diseases, if any, that the vines have, you will want to solarize the soil to help kill off most of what is in the soil.

https://www.gardeningknowhow.com/garden-how-to/projects/how-to-solarize-garden-beds-to-eliminate-garden-pests-in-the-soil.htm

You're still good to prune hard—do it ASAP before they leaf out fully. Cut down to 2–3 thick main canes, about 2–3 feet (60–90 cm) tall. Trash everything else. Tie survivors to a fence or trellis—horizontal arms, 1–2 per side. Grapes only fruit on 1-year-old wood, so this reset gets them back on track. Mulch 3 inches (7.5 cm) deep to lock in warmth and moisture (straw, leaves, or bark chips). Water deep every 10 days after the ground fully thaws. Don’t fertilize until mid-May, then use low-nitrogen stuff or compost—too much nitrogen = all leaves, no grapes.

https://www.gardeningknowhow.com/edible/fruits/grapes/grapevine-pruning.htm

https://www.gardeningknowhow.com/edible/fruits/grapes/growing-grapevines.htm

I can't quite tell what kind of vine that is. The bark suggests grapes. If so, they have a lifespan of about 30 years, though some can live to 100 or so. If conditions become less than ideal, then this can happen much faster. I would give it a little more time, and check for life. Scratch one of the branches and make sure that there is a little green to it. Once you find green, you can be sure that it is alive.

https://www.gardeningknowhow.com/ornamental/trees/tgen/tree-scratch-test.htm

We don't make vendor recommendations but your local extension agent might. Here is more:

https://www.gardeningknowhow.com/garden-how-to/info/what-is-extension-service.htm

Hello:

Thank you for sending us your gardening question.

This looks like a problem with erineum mites and there is no control available. It does not affect fruit yield. Here is more:

https://ccenassau.org/resources/-grapes-problems

https://ipm.ucanr.edu/PMG/GARDEN/FRUIT/PESTS/grerineummte.html