since the other seem to have covered most of it already, i think what she needs to work on is getting that electric hook in when in half guard. I know shes still green but this is just what i see. you know its all positive criticism. getting the electric hook means lots of whip ups and whip downs etc. maybe we could ask magnus to put up some of his electric chair stuff using the gi, he taught me some beautiful entries that would have helped here bt i cant remember them well enough.
basically though, getting that hook in under the leg and threatening with a dogfight is the best way to stuff around with them in lockdown.
the first mistake is that she went and got the angle with her legs which pushed her body up against the boys thigh and cut down the space in which she can get the hook, if she went the other way and got on her shoulder first then she has a much bigger gap to use, (pretty much go to grab his bum and then slice it up to his knee) if she is on that side and he is controlling her and she cant get to the other side then what she can do is whip to the side by upper cutting her arm and then when he is off balance, blast her up under for the hook, she had the chance quite a few times but isnt use to grabbing it yet. ( in gi you can grab their belt to help control them and whip them.)
second mistake is that she only had her lockdown extended. 1. this means that she has less movement herself and 2. if you keep a kind of butterfly stretch its harder to get out of your lockdown (your legs can hook theirs at better angles and are closer to the butt so its harder to twist their legs out) and you can use the extension to stop them from mounting any offense. (stretch your legs out and they lose their base) 3. extending your legs and keeping them out will gas them quickly. butterflying them keeps your strength only using them for little bursts.
she also needs to calm down in electric chair, imo she went into stoner control too quickly and didnt control the leg enough and thats why he got out. in more detail, she needs to keep a stronger neck and make sure that shes twisting his leg. this will help lock the leg on the shoulder. next step is also be aware of getting up to her hand, this will make him more unbalanced.
next thing is remember what eddie said on JRE. if you think youre going to lose the leg, roll back on to your back and reset the leg. she also lost the lockdown when doing the sweep. get those leg curls in and squeeze that leg tight. also remember that you can use your legs still to destroy his base. let the pressure off for a second and then smack them back on.
as breifly mentioned before, threatening with dogfight is a proper threat. having him help you move in the right direction is a massive boost. for someone who is aware of the electric chair sweep (everyone these days) it was clear she was aiming for it the moment she got lockdown. get double unders, get onto the shoulder get the hook, threaten wtih dogfight by pushing into him (and if he goes with it, smash him with dog fight) when he pushes back then swing back, flow with go. the moment your flat on your back, swing those legs over. thats how you get the momentum to stop them basing properly.
thats all i can really say about it atm, remember gi grips are great for lockdown aswell. she can grab his pants in the electric chair sweep. sucks that she lost but great to see her always improving. hope this helped.
BTW im pretty sure what i said is all correct but if someone, especially higher belts would like to correct me feel free.