Answer:
I'm not sure what their historical views on adoption are, but in the two Amish communities we have lived in Adoption was becomming increasingly accepted. Many couples who could not have children naturally were becoming foster parents with the hope of being able to adopt children. I beleive historically, they have been hesitant to become foster parents due to requirements such as the requirement to obtain a photo ID. At least that had been an issue in one Amish community in Illinois where we resided.