The Department of Homeland Security has designated Cameroon for Temporary Protected Status, protecting Cameroonians residing in the United States since April 14, 2022:
In addition, the federal register notification of Ukrainian TPS has been published, and now permits Ukrainians in the United States as of April 11, 2022 to apply:
https://www.govinfo.gov/content/pkg/FR-2022-04-19/pdf/2022-08390.pdf