Grant Fritchey shows us that you can force a parallel plan using Query Store:
I love the questions I get when presenting: Can You Force a Parallel Plan in Query Store. I haven’t a clue. The trick I think is going to be in setting up the test. Let’s try it out.
Reliably Getting a Parallel Plan
Because this is for testing, rather than try to build some crazy query that may or may not go parallel, I’ve decided to cheat. I’ll take advantage of a little functionality that ensures I see a parallel plan when I want to.
Read on to see Grant’s trick and also the results of this test.