I have listed in this location guide which areas you can find the purple sigils in The Talos Principle Reawakened.
Location of Purple Sigils
Here are the purple sigils locations you might need for puzzle solutions in The Talos Principle Reawakened:
Area A2
Behind the theater:

Area A3
In the puzzle “An Escalating Problem” and In the puzzle “Stashed for Later”:


Area A4
In the puzzle “Branch it Out”:

Area A5
In the puzzle “Things to Do With Two Boxes”:

Area A6
In the puzzle “Deception”:

Area A7
In the puzzle “Locked from Inside”:

Area B1
On an elevation near the water, close to the puzzle “Window through a Door” and In the puzzle “Road of Death”:


Area B2
Between the statues above the entrance to the puzzle “The Tomb”:

Area B3
In the puzzle “Whoosh!” and By one of the walls, in the main area where the teleport is located:


Area B4
In the puzzle “Self-Help Tutorial” and In the puzzle “The Right Angle”:


Area B5
Next to the puzzle “Behind the Iron Curtain”:

Area B6
On one of the pillars next to the teleport:

Area B7
In the puzzle “Big Lump of Mine”:

Area C1
Above the rock, behind the puzzle “The Conservatory”, close to shore:

Area C2
Close to the teleport and the entrance to the puzzle “Rapunzel”:

Area C3
Near the entrance to the puzzle “Weathertop”:

Area C4
Close to the teleport and the entrance to the puzzle “Throne Room”:

Area C5
Near the entrance to the puzzle “Time Crawls”:

Area C6
By one of the walls, in the main area where the teleport is located, near the entrance to the puzzle “The Seven Doors of Recording”:

Area C7
In the main area where the teleport is located, between the puzzles “Dead Man’s Switch” and “Carrier Pigeons”:
