Hi,
Thank you for posting your concern.
You may refer to this guide to see the available field for the AdwordsUserListService. However, currently it's not possible to get create time of the userlist via this service. With regard to use status, there are several available status fields below. You may check if these are the fields you are looking for.
Please let me know if you have further clarifications.
Regards,
Hiroyuki
Google Ads API Team