The posted note states that this patch change applies The latest generation of MacBook Prospecifically the 14-inch and 16-inch MacBook Pros using the M4 chip. According to the source of MacRumorsthis measure will also be a repair option for other MacBook Pros equipped with an Apple Silicon processor, i.e. devices manufactured from the 2020 generation onwards.
At this time, the Californian company has not released any official information to know exactly how much this individual speaker repair will cost. But we should expect a significant reduction in the bill for Macbook Pro owners whose sound no longer works very well!