Hayward needs another compatible variety nearby to set fruit. Most kiwi vines need at least one compatible male pollinizer nearby, and one male can often support several fruiting females. It flowers in mid bloom, so a partner has to be flowering at the same time to be any use. Usually grown in USDA zones 7-9.
No single variety stands out as the obvious partner, but that is not a problem here: Matua Male and Tomuri Male all bloom close enough to work. Pick whichever your nursery actually carries. Keep male and fruiting kiwi vines on the same pergola, trellis row, or nearby support so pollinators can move easily between open flowers.
One thing to keep in mind. Most kiwis need at least one male pollinizer for nearby fruiting vines. Jenny is the easier exception, not the rule. Most kiwi plantings need at least one male vine nearby to pollinate several fruiting females.
To put that into practice: at a minimum, plant one fruiting kiwi plus one compatible male pollinizer, unless you are growing a self-fruitful type such as Jenny. Better still, grow one male kiwi for several fruiting females, or pair a self-fruitful kiwi with another compatible vine for stronger crops. If you have a healthy kiwi vine with flowers but poor fruit set, add a compatible male pollinizer before assuming the vine is the problem.