How does one change the leading of a text?

Self-explanatory.
I looked around and it doesn’t seem like there’s a way to change the space between baselines.

I know there’s text(baseline: length), but it’ll be excruciating to change each line independently.

If you want to change the leading of the text, it’s one of the parameters of the par function.

You can start your document with:
#set par(leading: 20pt)