This isn't about the 737-MAX, it's about a new sub-model which currently only exists as a prototype and is undergoing a lengthy test and certification process.
AFAIK it's scheduled to start passenger flights end of this year or year early next year and this specific issue might have no impact on that.
Also related: "Opposition grows to Boeing 737 MAX 7 safety exemption"[1] (3 points, 4 days ago) "Boeing Requests Boeing 737 Max 7 Certification Exemption over Anti-Ice Issue"[2] (3 points, 25 days ago) "U.S. lawmakers decline to add Boeing 737 Max exemption in defense bill"[3] (37 points, 1 year ago)
This isn't about the 737-MAX, it's about a new sub-model which currently only exists as a prototype and is undergoing a lengthy test and certification process.
AFAIK it's scheduled to start passenger flights end of this year or year early next year and this specific issue might have no impact on that.