I have scoured the internet before posting such a basic question, but have found no solution. In RStudio I can split one code chunk into two chunks by typing cmd + opt + i on mac while cursor is within an existing code chunk. Is there no equivalent functionality in VS Code?

If I type the keyboard shortcut to create a VS Code block (shift + cmd + i) while cursor is within an existing code block it merely creates a new code block below.

I want this:

1 + 1
<imagine my cursor here>
1 + 1

to become this:

1 + 1

1 + 1