Access to mapping element mappings from computed twig?

Hi,

I have a mapping element and a computed element.

I simply want to access the mapping elements within the computed twig element so I can assign a score of correct mappings.
I've spent some time experimenting without any success.

{{ webform_token('[webform_submission:values:tst_map]', webform_submission) }} where tst_map is the element key provides all the mappings.

data.tst_map - yields nothing?

I want to do something like :-

if data.tst_map.source.option1 maps to data.tst_map.dest.option2 then increment ++correct_count else ++failure_count