Unfortunately another roadblock. Both Zapier and Integromat do not allow selecting the SINGLE SELECT Field as a Trigger to start workflows.
Some other restrictions exist, e.g. Zapier allows Sing line text field to be a Trigger. Integromat does not allow even that, trigger can not be either text or Single Select.
I may be mistaken but I tested both and both field types are unavailable as trigger. That’s a disappointment and I’ll reach out to Zapier and Integromat to comment on that. I’ll update here once I get some feedback.