Hubby and I are missionaries. While we don’t work directly with that group, one of our colleagues on the field does. He has told us of this occurrence.
Christian missionaries in Jordan doing humanitarian work are asked not to share their faith unless approached by Jordanians to do so. Then they are free to answer questions, bear witness, etc.
According to him, there are a lot of secret Christians in Jordan who maintain a Muslim facade to avoid family conflict but are Christians in their heart, read the Holy Bible and get together for house meetings.