unfortunately one thing i learned from having to make doctors write notes and fill forms is you really do have to dictate. they always want to write whatever is quickest which never paints the full picture and that more often then not gets disabled peoples support applications denied.

i don't know how good your relationship is with your doctor, but it may be good to stress that the employment insurance is requiring a detailed note so if they feel inconvenienced by the extra work it's out of your hands. maybe you can ask about booking a longer appointment with them based on how much time you think you'll need for a detailed note?

also sorry if this advice is unwarranted but i try to give it to everyone because sometimes even myself and others can have their disabilites downplayed. but to a doctor, and especially for any disability support applications, always answer any questions as you would if its your worst day. as an example, i can technically do basic hygiene, laundry, walk for some distance etc on a good day but on my worst day? when my symptoms are at their most unbearable? absolutely not, i would be bedridden! don't let yourself be tricked by the application or your doctor in downplaying your symptoms, always ask yourself if you're able to do certain things on your worst day because i've seen people get denied for not doing that which isn't even their fault because the system is rigged and ableist.

you may have to be insistent with your doctor if they give you pushback though. you will always know yourself best.