Go Through Walls in Minecraft java with Commands
execute at @a[nbt={SelectedItem:{id:"minecraft:blue_candle"}}] anchored feet run tp @p ^ ^0.01 ^0.1
execute at @a[nbt={SelectedItem:{id:"minecraft:blue_candle"}}] anchored feet if block ^ ^ ^0.5 minecraft:iron_bars run tp @p ^ ^0.01 ^0.1