Took my daughter to my pro shop to get some work done on her bowling balls, and was told she has 3 degrees of tilt. Is there anything she/we can do to get her more tilt?

The pro shop owner did not say either way, it seems to me her ball is flat. It seems to have advantages and disadvantages. She recently competed in a Teen Masters tournament and did really well on the short pattern but struggles on longer/high volume patterns.

The pro shop did mention that what she is experiencing is a loss of power (hopefully I remembered correctly) at the pins due to her only having 3 degrees of tilt.

She is 16 years old, throws 14lbs, rev rate unknown, PAP is 4&5/8 1" up. she is small and throws the ball at about 13-13.5 as read on scoring machine.

Her "loss of power" is being a small 16 yo girl, throwing a 14 lb ball at 13 mph with probably a low rev rate.  Teach her how to line up high flush.

On longer/high volume patterns there is no movement (understand on high volume won't see a ton of movement anyway) and no power when she hits pocket, leaves 8-10s, 5-10s.

If she has movement on the short pattern and not the long it is from lack of revolutions, not the low tilt.  Expectations need to be realistic about what a person is physically able to do. 

She is 16 years old, throws 14lbs, rev rate unknown, PAP is 4&5/8 1" up. she is small and throws the ball at about 13-13.5 as read on scoring machine.

These PAP numbers indicate that she does have tilt. And if she is rolling the ball forward and not circling the ball very much, that would explain her ability to hit a short pattern and have trouble with longer patterns or higher volume patterns.
As she continues to bowl, good coaching and practice techniques will allow her to sharpen her game. If she has good timing, she can incorporate more foot speed to raise her ball velocity without more effort. For those of you who have seen Carolyn Dorin-Ballard bowl, she would be a great example of using what she has to great effect.