On October 15th 2019 the USCIS was planning to implement new affidavit of support requirements for applicants attempting to obtain lawful permanent residency. However, various Federal District Courts have stayed the implementation of these new requirements.
This means, until further notice, green card applicants can still utilize the current version of USCIS form I-485 (application for permanent residence) as well as form I-864 (affidavit of support) with the current evidentiary requirements for purposes of meeting the public charge rule.
https://www.natlawreview.com/article/public-charge-rule-update-making-sense-all-moving-pieces