This is fascinating. Three years ago, after recovering from COVID, along with many long haul symptoms I developed several similar to but still distinct from narcolepsy. Even now as the CFS-like symptoms have mostly faded, the narcoleptic symptoms are still present. Unfortunately I've not been able to get a positive diagnosis of any sort because it's atypical.
There are two main symptoms I experience. First is that, often without any clear provocation, I will become very fatigued and weak. This usually occurs over about 20 minutes, but the initial onset is a distinct event I've come to recognize. It gives many of those same long COVID symptoms: brain fog and drowsiness, weakness to the point of struggling to stand up or keep my head up, uncoordinated movements, and a feeling like I've been up all night and I desperately need to sleep. This often subsides after an hour or two, but it may last several hours.
The second which is perhaps just a more extreme case of the first is a complete inability to wake up. I may be slightly aroused and fade in and out of consciousness, but I have no ability to control this. I typically cannot move during this: everything feels so exceptionally tired and heavy that I feel like I don't have the strength to move anything, even to turn my head. Depending on how conscious I am at any moment, I may realize I'm in this situation, or I might imagine that I'm just really tired or depressed and that's why I can't move. These episodes tend to last many hours, often 8 or more. They can happen as an extension of my random bouts of sleepiness, but often they occur as an extension of my normal sleep, resulting in me not being able to wake up - even when physically aroused by someone else - until well into the evening.
In both cases the sleep is not restful. Instead I often feel it come on again a few hours later, though less extreme.