NC State documents pollination by noctuid moths (not sphingid), but late-fall sphinx moths are part of the same cool-weather Lepidoptera community working the bloom. Use as a generic proxy until a noctuid-moth wildlife slug exists in the Plotwright catalog.
Petunia inherits a moth-pollination syndrome from its wild parent Petunia axillaris (pale, fragrant, long-tubed, evening-scented flowers). Pale fragrant garden cultivars retain that scent and are visited by night-flying hawkmoths, though modern bedding hybrids vary widely.
Hummingbird clearwing moths (Hemaris spp., family Sphingidae) work wild bergamot during the day — they're often mistaken for hummingbirds at first glance because of similar size and hovering flight.
The long tubular corolla is well-suited to long-tongued sphinx moths, which work woodland phlox at dusk and dawn during the spring bloom window.