How retaining Singapore could shift the Pacific campaign

What would an Allied campaign against Japan look like if Singapore had been retained?

After securing Malaya, the Allies could use Singapore to obstruct Japanese resupply and launch operations toward the Philippines, shifting more of the campaign northward.

Once the situation in Malaya was secured, a surviving Singapore could obstruct Japanese resupply farther south. That barrier could prevent as much of Indonesia from falling under Japanese control. Singapore would then offer an Allied base for pushing north, potentially toward the Philippines. The broad campaign against Japan might remain recognisable, but more of the fighting would begin farther north, with less territory to recover around Indonesia and the Indian Ocean.