Can you use env from workflow-surveys in custom notifications?

Hello again!

Id like to add in a workflow a text from the executor/requesor with a reason+name with the env: {{ user_reason }} and like to add it to the “Workflow pending message”, but i cant save it then, when i add the var without anything else, with “” and with ‘’ i cant safe the settings and dont get any error.
I saw some requests in the Git for adding all enviroment variables as whitelisted in the custom messages but they didnt see the use of it and i m still not shure if the env user_reason is the same as those they requested to include.
I read the docs and see there is the extra_vars included, but cant use: {{ job.extra_vars.user_reason }} or #{{ job.extra_vars.user_reason }}

Thank you again for you valuable input!