Question regarding PZC Tunesia 43

[Indragnir]

That was the evacuation from Messina, Sicily to the mainland of Italy.

Butcher added—the failure to land HUSKY forces “on both sides of the Messina Strait, thus cutting off all Sicily.” “It is astonishing that the enemy has not made stronger attacks in the past days,” the commander of the Messina flotilla, Captain Gustav von Liebenstein, told his war diary on August 15.

Atkinson, Rick. The Day of Battle: The War in Sicily and Italy, 1943-1944 (The Liberation Trilogy Book 2) (p. 168). Henry Holt and Co.. Kindle Edition.

A few escaped, in dinghies or by lashing themselves to the undercarriages of the last overloaded Axis planes to leave. Ultra eventually disclosed that only 632 men were evacuated in the final days;

Atkinson, Rick. An Army at Dawn: The War in North Africa, 1942-1943, Volume One of the Liberation Trilogy . Henry Holt and Co.. Kindle Edition.

You are correct for Sicily 43 but not Tunisia 43.

You're right.

However some (parts) of units did escape from Tunis to Sicily, even more were waiting for transfer to Africa and never got the chance to do so. That's why HG division was in Tunis fighting and a couple of months later fighting again in Sicily.
Anyway the number of evacuated was not great once Allies got the air-sea blockade on. It was so effective that sank/shot down about 80% of supply and reinforcements sent to Tunis even before Operation Vulcan started.
For example 679 men from 10th PzDiv escaped to Italy, only 153 from 21st PzDiv, 212 from 90th Light Division etc.