baritone bridging over void in skyblock

just wanted to know how to get the bot to bridge from point A to B in a skyblock world i have modified the throwable items list, made blockplacementpenalty to 0, allowed inventory, enabled assumesafewalk. the bot still has no clue how to get to Point B just walks to the edge of the island and stops

i need the bot to bridge roughly 5-7k blocks with bottom slabs to prevent mob spawning

is there anything im missing or am i doing anything wrong?