I have linked the 2019 UC Transfer GPA by major and campus to give admit range targets. This is updated each year.
https://www.universityofcalifornia.edu/infocenter/transfers-major
Regarding waitlists, since this year is unique, schools may go their waitlists more readily.
2019 Waitlist stats:
Waitlist Offers: 20,000
Waitlist Admits: 4,300