The MAX 8 and 9 have the same issue[0], and have a temporary exemption with guidance to the pilots on when not to use the deicing. I think the idea is that this is an issue that can be managed, and the cost of grounding hundreds of planes for such an issue is substantially higher than the cost of delaying deliveries for a plane with no existing fleet. That different cost also leads to a different tradeoff for the two cases.

[0] https://www.federalregister.gov/documents/2023/08/10/2023-17...