If Draven unit and opponent unit are both stunned after combat and attacker was recalled, does Draven draw?

No, you do not draw a card with Glorious Executioner.

Reasoning

According to Rule 461.3.d (as updated in the 2026-04-29 FAQ clarification), a combat result of "No Result" is reached if units were recalled during the Combat Cleanup.

In your scenario, because an attacking unit was recalled during the Combat Cleanup, the combat result is officially "No Result."

Because the result of the combat is "No Result," you did not "win" the combat. Consequently, the condition for your Glorious Executioner legend ability ("When you win a combat, draw 1") is not met, and the ability will not trigger.

Sequence:

1. Combat Cleanup (Step 3): The game performs the Combat Special Cleanup.
2. Recall: Because defending units are present, the attacking unit is recalled to its controller's base.
3. Determine Combat Result (Rule 461.3): The game checks the state of the battlefield. Because a unit was recalled during the cleanup process, Rule 461.3.d dictates that the combat result is "No Result."
4. Legend Check: Your Glorious Executioner ability checks for the combat result. Since the result is "No Result" (and not a win), the ability does not trigger.