Have you tried using terminate in the middle of an apply to each? Did you get The operation terminate cannot be used inside a for each?

Terminate
The terminate action is so often misused. As I mentioned a while back the terminate action should really not be used. But if you are inside an apply to each processing 1000s of records then cancelling out might be something that you want to do.
Cancel flow runs
There is now an option to cancel a flow run. As shown in the following example, I want to terminate my flow when the value of the item being processes is set to 4.

Using the Cancel Flow Run action you can now cancel your flow runs.
Yes, you could use this to cancel other flows( e.g. get a parent flow to cancel a child flow. Or the other way around. But you can also use this to cancel the current flow run.
Configure the cancel Flow Run action
To cancel the current run all we have to do is configure the actions as shown below:

For the Environment we can use:
workflow().tags.environmentName
For the Flow can use:
workflow().name
For the Run ID we can use:
workflow().run.name
So just with a few simple expressions, we can cancel the current flow run, even inside an apply to each or do until step.
hello, what is the name of cancel flow run on power automate, I cant find it when I type cancel flow run.
It is called “Cancel Flow Run”
I also had problem finding it. Look for Power Automate Management first.
Is this only an option for solution-aware flows?
No, it should work for all flows.