With the above, you could probably use radio boxes, but yes generally a problem that I haven’t seen a solution to is how to set up a checkbox group that submits a comma-separated list of values selected. At the moment, webflow seems to only be able to handle one checkbox at a time with True or False (or ‘on’ or blank)
You can copy and paste the code and instead of google spreadsheet you can do the same thing with Airtable. If you have multiple checkboxes on your website you’d have to create multiple steps with the JS code before running the Airtable integration.
The code will basically look for any data value: true and return only the true value. Make sure you map out the js zapier code at the Airtable step and not the webflow form submission. Hope this helps.