Frida was split into two PIP packages.
frida only contains the python bindings, while
frida-tools also contains the familiar command line tools from earlier releases.
This is explained in the news post for the 12.0 release:
One thing that caused a bit of confusion in the past was the fact that
our Python bindings also came with some CLI tools. Frida is a toolkit
for building tools, and even though we provide a few sample tools it
should be up to you if you want to have them installed.
Up until now this meant anyone building a tool using our Python
bindings would end up depending on colorama, prompt-toolkit, and
pygments, because our CLI tools happen to depend on those.
Well, that changes now. If you do:
$ pip install frida
You will now only get our Python bindings. Nothing more. And this
package has zero dependencies.
The CLI tools might still be useful to you, though, so to install
$ pip install frida-tools