The Query interface available in the Posts element and the Query Loop feature of Bricks enables us to order items of any post type by the value of a date-type of custom field.
Here’s a sample screenshot of this out-of-the-box option:
Here we are telling Bricks to ask WordPress to fetch the latest 10 (this is the number set at Settings → Reading → Blog pages show at most) posts of a
workshop Custom Post Type with the items (posts) ordered in ascending order of the value of a
workshop_date custom field that is of Date-type.
Note that this will output only the posts that have the custom field populated.