I looked through the rules and I think this is right, but does Kannan crew allow you to take an action after a white maneuver through debris?

I think so, as long as you didn't start the turn stressed. You run over the debris, assign a stress token immediately after the Check Stress step due to the debris (and roll for damage), then remove Kanan after executing the maneuver.

I think so, as long as you didn't start the turn stressed. You run over the debris, assign a stress token immediately after the Check Stress step due to the debris (and roll for damage), then remove Kanan after executing the maneuver.

You've got the order slightly off. The damage from debris doesn't happen until after the perform action step.

1. Perform manevuer that overlaps debris.

2. Assign stress token.

3. Kanan triggers and clears stress.

4. Perform action.

5. Roll for damage from debris.

WWHSD, can you give us the reasoning behind why you take damage after that?

Can someone pull up what the exact steps to executing a maneuver are anyway btw?

WWHSD, can you give us the reasoning behind why you take damage after that?

Debris Cloud: After the “Check Pilot Stress” step, the ship receives one stress token. After the “Perform Action” step, it rolls one attack die. On a [critical hit] result, the ship suffers one critical damage. The ship can still perform attacks

Can someone pull up what the exact steps to executing a maneuver are anyway btw?

1. Reveal Dial: Reveal the ship’s dial and take the maneuver template that matches the chosen maneuver.

2. Execute Maneuver: Resolve the following substeps in order:

a. Move Ship: Slide the maneuver template between the front guides of the ship’s base so that it is flush against the base. Then pick up the ship and place it at the opposite end of the template, sliding the rear guides of the base into the opposite end of the template.

b. Check Pilot Stress: If the maneuver is red, assign one stress token to the ship; if the maneuver is green, remove one stress token from the ship.

c. Clean Up: Return the maneuver template to the pile of maneuver templates. Place the revealed dial outside the play area next to the ship’s Ship card.

3. Perform Action: The ship may perform one action.

So anything that says "After executing a maneuver" (usually with some additional condition) is effectively step 2-d, the Debris Cloud stress is between 2-b and 2-c, and it's roll for damage is after step 3.

WWHSD, can you give us the reasoning behind why you take damage after that?

Can someone pull up what the exact steps to executing a maneuver are anyway btw?

Just checked the rules under Obstacles-Debris. That appears to be the proper sequence for moving through a debris cloud, taking stress, triggering Kanan, performing an action and taking damage. Page 14 of the PDF rules #36.

To summarize then (mostly to make sure I've got it right...)

Kanan (Crew): Once per round, after a friendly ship at Range 1-2 executes a white maneuver (so step 2), you may remove 1 stress token from that ship.

Debris Cloud: After the “Check Pilot Stress” step, the ship receives one stress token. After the “Perform Action” step, it rolls one attack die. On a [critical hit] result, the ship suffers one critical damage. The ship can still perform attacks

1. Reveal Dial: Reveal the ship’s dial and take the maneuver template that matches the chosen maneuver.
2. Execute Maneuver: Resolve the following substeps in order:

a. Move Ship: Slide the maneuver template between the front guides of the ship’s base so that it is flush against the base. Then pick up the ship and place it at the opposite end of the template, sliding the rear guides of the base into the opposite end of the template.

b. Check Pilot Stress: If the maneuver is red, assign one stress token to the ship; if the maneuver is green, remove one stress token from the ship.

b.i) Then assign stress from Debris Field here

c. Clean Up: Return the maneuver template to the pile of maneuver templates. Place the revealed dial outside the play area next to the ship’s Ship card.

After Executing Maneuver Kanan triggers here to remove one stress token if a white maneuver had been executed
3. Perform Action: The ship may perform one action.
4. Roll for critical damage from debris field here

Right?

yes

WWHSD, can you give us the reasoning behind why you take damage after that?

Can someone pull up what the exact steps to executing a maneuver are anyway btw?

Slugrage nailed it. It's weird timing but it's the order of operations that is called out by the rules for debris.