Psionics in XCOM (ipad version)

Psionics in XCOM (ipad version) - Man in Black Dress Shirt Holding Pen and Macbook Pro

I am quite far in this game have plasma weapons full satellite coverage. I have not yet found a sectoid commander and don't have Psionics researched. Have I progressed incorrectly. I played on the PC and seem to remember encountering sectoid commanders fairly early.

Is there a glitch?

xcom-enemy-unknown

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