On my last turn, I attacked with Blitzle's "Thunder Spear" attack. If I evolve it into Zebstrika this turn and use "Coordinated Bolt", will it do extra damage?
Yes, Zebstrika is not the Pokemon that attacked last turn; Blitzle was your other Rapid Strike Pokemon that used an attack on the previous turn.
Source: Chilling Reign FAQ; TPCi Rules Team (2021-06-17)

Relevant cards

Note: All applicable cards may not be listed below.
SWSH6_51
SWSH6_51