Is there a command in Minecraft Bedrock that can be used to create a concrete wall?
/ fill x1 y1 z1 x2 y2 z2 minecraft: stone
for x1, y1 and z1 you have to enter one corner of the coordinates. At x2, y2 and z2 the other corner. You can get the coordinates by looking at the corner block and then pressing the TAB (the one with the 2 arrows).
You have to replace "stone" with your wish pad.
IMPORTANT!
"stone" is the ID of stone. Google for the ID of your desired block to replace "stone"