Yes, the hub is identical
Same 4x98 PCD and same 58.1 mm centre bore: wheels from Lancia Delta III bolt on and centre on Fiat 500e II without rings. You still need to check the offset and tyres, detailed below.
≈: width estimated from the original tyre size.
Wheel by wheel: offset and tyres
Each original wheel from Lancia Delta III is compared with the one from Fiat 500e II of the same diameter: how much closer the wheel gets to the shock absorber or how far it sticks out of the wheel arch, and whether the tyre keeps the same overall diameter.
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7Jx16 ET31 · 205/55R16 — Risk of rubbing
Compared with the original 6Jx16 ET41 on Fiat 500e II: shock absorber side +2.7 mm, wheel arch side +22.7 mm, tyre diameter +1.8 %.
Check in detail
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7Jx17 ET31 · 225/45R17 — Risk of rubbing
Compared with the original 6.5Jx17 ET41 on Fiat 500e II: shock absorber side −3.7 mm, wheel arch side +16.4 mm, tyre diameter +2.9 % : fit it with the original tyre size of Fiat 500e II (205/45R17), not that of Lancia Delta III.
Check in detail
Before fitting the wheels
An identical hub is not enough: offset, width and diameter change the position of the wheel, and larger calipers can touch a smaller wheel. Original wheels often use bolts or nuts with a specific seat: keep the fixings intended for the wheel, with the thread of Fiat 500e II (M12x1.25), tightened to the torque shown on its vehicle page. Finally, check that the size is among the approved fitments for your vehicle. This comparison is for guidance only: have the fitting approved by a professional.
And the other way round: wheels from Fiat 500e II on Lancia Delta III?