Hi i have adhd and i can rly struggle with revising, im going to explain what helps for me and if you see anything thag might be able to help you please try it. I am not exaggerating when i say that doing some of these things gave me an A.
For me i really struggle studying in my own home bc theres so many things i can be doing, a change of scenery is really helpful for me to lock in. During exams i literally went to the library every single day i could and i got so much studying done. Being in a public environment where i feel like ppl could judge me a little for doinf nothing (which can also work for studying with friends) and having nothing else to do rly helped me.
Secondly i set up a focus on my phone (iphone but im sure theres things similar on other models) that i put on for when im going to study, i use this to silence all my notifications (except from **** like emails and other important stuff) and make it change my phone to light mode. Now i HATE light mode with a passion so i would get distracted and go on my phone and it would be light and it would annoy me so i would stop using it. Anything to deter you from doom scrolling would work or chatting with someone E.g. inverted colours.
When im in my own home however, i sometimes just feel so unmotivated, so to make studying more appealing i will watch a stream or a show ive watched several times (dont put on something rly interesting bc then u will just watch that instead) and i always listen to music while im studying. There has been times when ive felt so unmotivated and i put on music and a stream at the same time 😭😭😭. This does make me study slower and get less done but it's much better than doing nothing.
Also when i got a desk in my room i made sure i had one of those chairs u can spin on and roll around. I will slightly sway on my chair left to rigjt snd it actually helps so much. (when i first went to the library and saw they also had spinny chairs i literally felt so much joy i am not exaggerating). If you're a movement seeking person i highly recommend having a way you can move subconsciously.
Please remember that adhd doesn't have to stop you from doing wrll !!!! I got all As in the end of my exams. Definitely try a range of studying methods so you can find one that works for you. Good luck!!!