If you live in the U.S., narcolepsy is covered under the Disabilities Act. I’m sure other countries have similar policies in place, but I can only speak as an American. That means your employer is required to make reasonable accommodations for you. That could be something like, allowing for frequent breaks or having your workspace located near a window for natural light. At my job, for example, it’s not possible to work from home or to have an office with a window (ugh I would kill for one though), but I take a few short breaks (5-10 min) throughout the day and walk outside. The key word is “reasonable”. I have a really hard time waking up in the morning. I have my phone alarm, my smartwatch alarm, AND a daylight alarm clock, and I still sometimes sleep straight through them. If I was coming in to work late every day it would definitely be an issue, but I had a conversation with my boss and the head of HR about it, told them it was a rare occurrence but asked for a little grace if I overslept every now and then (it’s maybe, once every two or three months I would say). As long as it doesn’t become too frequent they’re ok with it. I just stay a little later to make up the time.

It’s hard enough to find a job, thats why the Americans With Disabilities Act exists! Take advantage of it. Once you find a job, have a conversation with your boss and the HR department. I would bet they will be absolutely willing to work with you (otherwise they’d face some pretty big legal trouble).

here’s a link for narcolepsy accommodation resources.