The market is crap, so I can't easily move out of the company, although I am looking. I'm also looking internally, but there are no dev jobs posted at my level internally (in a tech divison of over 5k!).
My manager says the department head wants to PIP me. The reason is supposedly that my throughput is too low and inconsistent (stories completed per sprint). However, a quick JIRA analysis shows I have completed roughly the same number of points as another dev at my level on my team. I have valid reasons for the inconsistency and it's common for others on the team to be inconsistent too - stories often hit major issues with the environment, confounding existing bugs, or even missing/incorrect requirements. It's not uncommon for our team bug fix/rework stories to consume 20-25% of our sprint capacity.
I also have a disability. So I tend to ask for help when I hit bigger issues, especially when there is no documentation. I was told this is being viewed negatively as a lack of independence even though I requested accommodations including more coaching. Others ask for help but maybe not as often. Those people have also been here longer than me and seem to ask other people more like a personal favor than an open question to the team.
So I'm screwed - PIP = department head wants me fired. Not sure what I can do. I know the best thing to do is leave, but there aren't any options for that currently.
Spend some work hours optimizing for the metrics that the managers measure. The goal is not to make a good job, it's to optimize your metrics (i.e. screw the system). The more points you get, the less work you have to do.
Make smaller stories, smaller tasks, overestimate the tasks, quickly contact the manager whenever a task is looking like it has been under-estimated and ask them to act on it (e.g. by splitting the task or modifying the estimate).
And don't feel bad about it: your manager optimizes for their metrics as well. The goal is not to make a good product, it is to optimize the metrics that people who feel clever put in place. If your company ever realizes that employees abuse the metrics, the solution will be to fire managers, and that's not you.
At the same time, actively look for another job.
Focus on getting off the train.
Will buy you some time at least.
Just keep working maybe communicate more when you close something...I don't know if you sail at all but right before you turn the boat where the boom swings across the stern you're supposed to yell "COMING ABOUT!!!!!" just do that. "INCOMING PULL REQUEST!!!!" anytime you do anything in all major slack channels.
BUt yeah you probably will need to get another job sooner or later.