Unsupported architecture: i686 — is 32-bit Linux out entirely?

We still have a small fleet of older 32-bit boxes doing one specific job, and I was hoping to run a few API scenarios on them rather than provisioning something new. The installer stops immediately:

Unsupported architecture: i686
  SDODS needs x86_64 or arm64.
  Docs: https://docs.sdods.com/docs/getting-started/installation/

I understand no browser engine is going to run there. But the API layer needs no browser at all — is the architecture check refusing something that would otherwise work, or is Node itself the blocker on these?