{% unless template == "templatename1" and "templatename2" %}
or {% if template == "templatename1" , "templatename2" %}
I would like to target "templatename2" as well but In this code, only "templatename1" is working.
You need to repeat the condition after the and
. And it's a or
because template cannot be both 1 and 2.
{% unless template == "templatename1" or template == "templatename2" %}
{% if template == "templatename1" or template == "templatename2" %}