webforms – How can we populate the taxonomy terms linked to the element below same element?

So, I have a webform term select element to which taxonomy terms are linked but once I select any term from the select list how can I populate the term(parent+child)below same webform element. Also, I would like to know, if I am cancelling any of the terms which are appended to that element then how can I preview remaining terms before submitting form? See the sample what I am looking for:

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Just would like to know any out of the box feature is available or how can we customize it ? Help would be appreciated, thanks.