How do I email a form from a tablet?

Open the form, then its PDF (“Form”): “Flatten fields” downloads the filled-in, flattened PDF, which you can share with the tablet's share menu (Mail, Messages, AirDrop…). “Export comments” adds the discussion thread to it.

For a grouped or formatted send-out, create a “Forms” report in the “Reports” menu, with “Attach filled forms as an appendix”: the generated PDF gathers the selected sheets.