I am beginning to feel like a broken record. I have been frustrated by multiple answers in the old quizzes not giving partial credit. So, I decided to use New Quizzes because someone said you could give partial credit.
Now, you are telling me that a matching activity doesn't give partial credit. That's the point of matching to quickly assess students on a larger group of questions. It is efficient. Canvas is not.
There are other threads and everyone I see is in favor of partial credit. Can't you offer the choice?
I believe the fill-in-the-blank question type uses partial credit and has an option for banked responses in which possible responses are in a word bank to be clicked and dragged into the correct blank. That should be a path to create matching style questions that include partial credit.