Sadly you can’t temporarily disable pipeline in Data Factory. But depending on what you what to do there are other options. If you want to debug a specific activity you can use the red circle above it. It’ll now stop while debugging.
You can also use this if you just want to disable a single activity in a pipeline. Move it to the end and add the debug red button. When the breakpoint it hit just stop the debug.
You could also do a clone of the whole pipeline and remove the activities you don’t need while doing your test.
If you want to prevent it from running a trigger simply remove the trigger on the pipeline.
There is sadly no way to disable an entire pipeline in Data Factory. There best way I found was using the branches and source control my way out of it. Remove all the pipelines I want to ‘disable’. And having it in code for later use.