Yup, they are protected by the Turks now.
There is only a small ISIS controlled strip in the Deir Ezzor region. It is much smaller than Afrin. So to say “virtually” is an error.
This is not over yet.
You mentioned that Assad gave Manbij to Turkey? We still hold it and show no signs of leaving that area.
The Kurds are still killing Turks and the FSA in Afrin. A week ago the number of them killed was almost 20.
If and when the Turk’s are not able to deliver air support, the Kurds (with or without the US) will retake Efrin.
They destroyed about 45 Turk tanks during the 2 month assault of Turkey on Efrin, before the SDF moved out to prevent total destruction of the City.