My WELS church announced they were providing ashes for those who wanted it. Is this a synod suggestion for all WELS churches, or is it being suggested for individual churches who want it?
I am thinking your question addresses the imposition of ashes for worshipers during Ash Wednesday worship services. With that understanding, let me say that the practice is entirely optional for congregations of our synod.
WELS Commission on Worship does provide resources for congregations who utilize that practice or are considering it. This link will take you to the WELS Resource Center and an “Explanation of the Imposition of Ashes.”