I am using mailwizz since last 2+ years. I have used it with amazon, mailgun, sendgrid and custom SMTPs. I never seen list unsubscribe in any email. If you are saying it depends on ip or domain reputation, it should be appear while using service of above mentioned service providers.
In my opinion, list unsubscribe option should be external and user should have choice, whether he/she wanna use it or not like other available tags and options in mailwizz.
please take this as a suggestion. since all ESPs are providing this facility whether user wanna use it or not.
thanks