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i do not have personal experience, though both Black Walnut and Asimina triloba are endemic/wild here. They grow together in the wild. I know at least one grower who intentionally planted Asimina triloba and black walnut together.i've also read in several places that Asimina trilboa is not affected by juglone. One person even used black walnut hulls as mulch around his Asimina triloba.So, I would say - go for it!
We have planted 2 decades ago 5 Pawpaw trees 45 to 50 feet away from black walnut trees on either side.So also our annual vegetable garden! No problems for tomatoes either!. Please note that we protected the young pawpaw plants for three to four years from direct sunlight.
My paw paw trees are planted right under the canopy of a huge black walnut that has killed apples, cherry, dogwood, witch hazel, but my paw paws thrive under it and produce loads of fruit every year. Red bud and native wisteria and black raspberry and wine berry, sassafras, locust, and poncirus do well under it too, as does day lily and hostas.
Penn State lists Asimina as resistant (at the very leas) to Juglone: https://extension.psu.edu/landscaping-and-gardening-around-walnuts-and-other-juglone-producing-plantsMy own pawpaws seem to be happier the closer they are to the walnut tree line, but that may just be due to the extra shade at this stage of their growth.