This site does not show my gavatar as other SE sites do.
Why? How can this be fixed?
And what should I ask so that it pass my question?
Here's the easy way to update your dp. Go to one of your other accounts (I used Stack Overflow as an example for the screenshots)
Once on that account, click 'edit'
Then scroll down to the bottom of the page, and click 'Save and copy changes to all Stack Exchange communities'
As all your SE accounts have the same message in the bio, the only change this will bring is to update your bio dp to the one on SO and your other accounts.