IDEs such as Eclipse, IntelliJ, VS Code, and similar IDEs, are ideal for SDETs but not for POs and BA Amigos who want to contribute. There are a few tools available like https://cucumber.io/tools/cucumberstudio, etc. that provide Gherkin editors as well as a slew of other useful capabilities, but they are paid.
If you are looking for something that is free, simple to use, and accessible to everyone, you can use: https://app.specflow.org/gherkin-editor/
The editor provides example scenarios for you to reference when you initially load the page. You can enter your own content into the text area, and the editor will highlight it. If you wish, you can even change the language via a dropdown menu.