Image gallery not responsive

Hello,

When looking at my image gallery on a mobile device, the page is not responsive.
I have made a screenshot with my phone to show the difference between the header picture width and the gallery when I would like to have all pictures visible.

BR,
Ralph

Hello there,

I hope you are doing well today.

How did you go about making this gallery? Did you use a third party plugin to make it?

I await your response.

Best Regards,
Support