>> Is "no code" meant to somehow imply something more?

In a way it's less. The products you list are much more capable developer products. These are more in the direction of the FileMaker or Access level of constraint, but implemented in a more modern way which means they can be fairly effective.

Using "no code" is just branding that hasn't been used broadly until now. Maybe it has, but it probably isn't well known enough to be unusable. I'd have called these "4GLs" perhaps.

Lots of companies are getting in on the act to create a market for this. All of the established companies making business software have some no/low code solution. Then there are newer companies like Zapier who do automation and are trying to be a connector between these apps.