Values ‚Äčin a custom composite webform 6.0.4

I need to create a custom composite with some fields in my form. There is also a date there. I have to compare the date field with another field.

I need an appropriate token to reference the date field in the custom composite. Can such a token be created at all?

I use webform 6.0.4 in drupal 9

Thank you in advance for your answer.