@Archmage MC
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Well technically if you wanna use quantum physics, Portals also include time due to the relation of spacetime and wormholes which becomes very complicated, but then its really hard to describe to people. So portals become space AND time related, while time also becomes space related, but in different ways.
1. Portals allow you to time travel to different points in space, which is what makes time OP.
2. Meanwhile Time can travel to parts of space in that area via time, but can't teleport.
and altering space can do quite a bit with dimensional shifts and Portals also control gravity due to black holes being a thing, which are celestial powers and often gravity related powers don't get that strong.