Queries on the Digital Services Act

I understand that the Digital Services act prohibits dark patterns per Article 25.

1. Does this extend to dark patterns in Internet of Things devices?

2. What happens to all the data collected prior to the enactment of the Digital Services Act, if it was collected by means of a dark pattern?

3. Is there any EU regulation on data brokers who may be selling data from websites that used dark patterns?

Thanks.

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