I did not want to inject code because I did not want to lose the AMP qualification of my blog post!
I ended up needing to re-image my table with rows and only 2 columns. I feel like it looks nice for what it is (both on desktop and on mobile), but I would still love to see further development by Squarespace of a table feature!
My responsive table: https://otpotential.com/blog/virtual-reality-and-occupational-therapy