If you check your deploy summary, it shows that no redirect rules were processed:
(Note: That’s a screenshot of your latest deploy, not a placeholder one, at the time of writing another deploy is currently building)
This indicates that the redirects rules have not been parsed. The
_redirects file that you’ve added (in the screenshot), is in the root directory which is not where it should be. It goes in the
publish directory, which is case of Gatsby is probably
public. To copy the
_redirects file to your publish directory during build time, you can leave the file in the
static folder and Gatsby will handle the rest.
Try this and see if it works and let us know if you’ve any additional questions.