Technically there is a sequence, but it would be way too long for a human to execute in their lifetime.

In practice, you solve it in steps, selecting sequences which solve a couple pieces at a time. The skill is identifying which algorithm to use when, and learning increasingly complex but efficient ones to get your time down.

The method I learned only requires memorizing like 7 algorithms and most of them are pretty short and only care about 1 or 2 pieces at once. I can solve a cube in about a minute.

If you want to get to competition levels (under 10 seconds) you have to learn many more increasingly specific algorithms, they're more complex, and they require you to pay attention to more pieces at the same time.