There's been a lot of reporting on Harris having a much closer and positive relationship with Silicon Valley than Biden, pretty much from the point where Biden withdrawing became a possiblity. Here's an example, but you could find plenty more:

https://www.reuters.com/world/us/us-vice-president-harris-vi...

It makes some sense. Biden was an ancient guy from the east cost, for whom the basis of wealth was manufacturing things and technology was confusing. Harris on the other hand built a political career in San Francisco during Silicon Valley's ascendancy. She would naturally view that industry in a more positive light, and would have had a lot of contacts with and backing from that set during her early career.