To disable the responsive layout you can use the same number of columns on Mobile as in the Desktop configuration. This can be changed navigating to Instagram feed > All Feeds > Feed Settings (pencil icon) > Customize tab > Feed Layout > Columns.

To disable the responsive layout you can use the same number of columns on Mobile as in the Desktop configuration. This can be changed navigating to Instagram feed > All Feeds > Feed Settings (pencil icon) > Customize tab > Feed Layout > Columns.