@Rebecca if you’ve had a reduction try power pumping to up your supply There’s loads on information online for timings etc
I've also seen online that you need to replace some parts regularly if you're using it a lot. I just bought some new yellow membranes for it so will report back if it works
I have a double medela swing maxi but I’m finding that I only get enough milk for one bottle per pump session. So I’m having to feed, then settle and then pump every few hours. At one point I was getting enough for two feeds. I’m not doing anything different which might cause a reduction in supply.. Did you have this experience with the medela?