Electric vs manual pumps

So I’ve breastfeed my baby from the get go and from our first day home I’ve pumped once at 2-3am and gotten milk for my partner to feed her from a bottle during night shifts. This has always gotten me enough milk. For reference I use the Momcosy s12 pro. I can’t remember how much exactly, but the first picture is how much I’d get (both boobs combined). But now I haven’t changed anything in my routine and I’m getting significantly less Everytime I pump. This was the same time just a different day. And the same settings and everything and the second picture is what I’m getting now. Looks more than there is as I’ve got it slanted. I was producing at least 6-8 ounces and now I’m lucky if I can even get 1.5 ounces. Ive seen people saying a manual is better. Would it be my pump is the problem as I never feel empty now when I use my pumps? My boobs still feel like they’ve got a decent chunk left in them. My baby is still feeding really well and gaining weight and she’s having lots of wet and dirty nappies, so she’s clearly getting enough straight from me. I’m just wondering whether it’s me that’s the problem or these pumps. Has anyone else had a similar problem? I’ve ordered 2 medala hand pumps and they should arrive in the next week. So hopefully these work a little better.