I didn't check the recipe , but did you do any stretch & folds after the rise? Do that in a big bowl - end over end, turn 180 get the other ends , then flip over, rest 15-20 minutes, stretch & folds /rest about 3 times.
Then put on oiled pan, let rise again , then carefully pull dough to corners a little bit- not too much stretch, just coax it. Rest and pull agin, it helps using your finger tips to make divits and coax it softly outward also. Using you finger tips also helps in getting the oil to fill the divits prior to baking.