What problem does this address?
It is currently possible to select multiple blocks in the list view by pressing "Shift + UP" and "Shift + DOWN":

The problem is that if you are trying to select a lot of blocks, it can take a while to select all of them.
What is your proposed solution?
I would like to select multiple adjacent blocks by using holding down CMD and clicking, which I tried but did not seem to work with Gutenberg v12.0.2

This multiple selecting by CMD+click style does work when used to select blocks in the editor itself, just not in the List View:

What problem does this address?
It is currently possible to select multiple blocks in the list view by pressing "Shift + UP" and "Shift + DOWN":
The problem is that if you are trying to select a lot of blocks, it can take a while to select all of them.
What is your proposed solution?
I would like to select multiple adjacent blocks by using holding down CMD and clicking, which I tried but did not seem to work with Gutenberg v12.0.2
This multiple selecting by CMD+click style does work when used to select blocks in the editor itself, just not in the List View: