Tips for getting a toddler to stop screaming when she’s mad/upset?

We validate feelings, outline the boundary, and give alternatives (eg I understand you don’t want to ride in the car anymore, but screaming is not ok. When you’re feeling angry you can make fists/squeeze this toy/kick the seat etc etc) We practice these techniques when she’s not upset too. We give warnings and outline plans before we go anywhere or do anything so she’s never blindsided.

She screams when it’s bedtime, when she doesn’t get something she asks for, when she gets frustrated that something isn’t working (eg she can’t open a bottle).

We don’t scream at her. We don’t give big reactions other than maybe a “Whoa! It sounds like you’re really upset!” But half the time we can’t even get a suggestion or sentence out because she just screams over us! It has gotten really bad in the past few weeks and I can’t understand why, and I don’t know what other way to address the behavior.

She’s 2.5y. Any advice would be appreciated!