If I played Canari this turn and I have 2 Heliolisk in play, can I use each of their "Frilled Generator" Abilities?
Yes, each Heliolisk can use its Ability. The "once during your turn" refers to each Ability individually.
Source: Ascending Heroes FAQ; TPCi Rules Team (2026-01-22)

Relevant cards

Note: All applicable cards may not be listed below.
ME25_64
ME25_64
ME25_185
ME25_185