Summary:

 Instead of being to be able spawn at a light level of 11 or less like Java the Piglins om Bedrock Edition are only able to spawn in complete darkness

Steps to Reproduce:

 -You can simply fly around on Creative or walk around on Survival and you will notice that there aren't any Piglins around most of the time, you can see them more oftenly on areas that aren't many Shroomlights.

 -You can use a Mob Spawner to simulate their spawning conditions too, create a small closed area with blocks and then place some weak light sources!

Observed Results:

 -Piglins only spawn at the darkest areas, preferably when there are no light sources around.

Expected Results:

 -Piglins being able spawn in areas where the light levels is 11 or less.