Creating a model that captures the count of non-null values from columns with a certain test

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I am trying to dynamically get a count of the non-null values for columns with a certain test. For example, if a column has a certain test, I would like to get that test’s name, and the COUNT() for that column from its respective model.

I want to bump the number of failures for each test against the number of non-null values to calculate a percentage

Currently, I have created a model with a query like this for each test, but I’d like to do this dynamically so I don’t have to keep adding a new union statements manually

SELECT
  <name_of_test> as test_name
  COUNT(<column_name>) as entries
FROM 
  <model>
UNION ALL
-- repeat for each test