Isn't calcium also an allosteric activator of muscle glycogen phosphorylase?

Isn’t calcium also an allosteric activator of muscle glycogen phosphorylase?

5AMP serves as the allosteric activator of muscle glycogen phosphorylase

Glycogen phosphorylase catalyzes the rate limiting step in glycogenolysis .
It is regulated by allosteric mechanisms and covalent modification by reversible phosphorylation and dephosphorylation in response to hormone action
In both liver and muscle the glycogen phospyorlyase is

Activated by phosphorylation catalyzed by phhosphorylase kinase