Unable to compare view count

I am working on Drupal 9. I have some code in View and overridden a field's output. Global counter value is displaying properly but unable to compare or check counter value in view. I need to show a class if counter value is 1 then used code {% if counter == 1 %} class here {% endif %}. But this is returning false always. Please suggest.

{{ counter }} is returning correct value always

{% if counter > 1 %} show class {% endif %} is returning false

{% if counter == 1 %}show class{% endif %} is returning false