Forbes has a report on this with an opposing perspective implying it's taking a while:

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Practically speaking, it takes time to execute such plans across so many different sites, especially in democracies where legal challenges and the importance of due process are valued.

I recall vividly, in 2018 and 2019, Hikvision USA reps assuring me and others that the NDAA and sanctions were just a misunderstanding and that somehow Hikvision was going to resolve them. Now, 6 years later, looking back, it is clear that was the beginning of a major structural change in the market.