How much weight should I be losing each week? What’s a good goal for those of us with PCOS.

Started at 86kg (190lbs) in February. Post partum with 3rd baby. Did 2 month of consistent deficit & exercise - 500-700 cal deficit depending on my exercise level for the day. Lost 2.4kg/5.5lbs in 2 months. Then had some unexpected health stuff come up and just life stuff so went back to maintenance sort of eating and dropped exercise from 3-5 times per week down to 1-2. Still got 8k steps most days.
Went back up at 86.6kg /191lbs by July.
At the start of August I locked in again aiming for a deficit of 700 calories, plus weights 3 times per week. 8-10k steps per day. I stick to it pretty much all the time, albeit at social events it’s hard to track but I purposely eat less than I usually would.
I play netball once per week as well so that’s 40mins of high intensity sport on top of
I’ve lost 3.1kgs/6.8lbs in 5 weeks of this.
I am doing it alongside some friends to keep accountable, similar starting weight, and they’ve lost like close to double what i have, still going to social events and eating outside of the deficit in these situations too.

I am on Metformin 1000mg.

I just feel like this is slow progress for all the work I’m putting in compared to my friends? Even though we weighed the same at the start?
It’s hard to stay motivated each week when I’ve lost 80% of that is the first 2.5 weeks and since then it’s very very slow going.