Is your management chain aware that you are diagnosed with ADHD? Staying off Slack should be considered a very reasonable accommodation for your condition. Perhaps go ahead and do it, but also tell them why, and how it will improve your productivity.
Alternatively maybe it's time to look for a different job with a more appropriate working environment, one that doesn't lead to such stress. How have you found previous jobs, in terms of being able to focus?
No, and I don't think it will help, to be honest. They will just start paying even more attention to my work and decide it's not worth it.
*> punches through notification settings
I'd like to specify which aliases should not be ignored but I can't in Slack, unless I'm missing something.
Also, disabling the oragen counter is not possible (even for muted channels).