We have a couple of these Spigen chargers from Amazon, which my wife and I each use for our phone and watch. We have occasionally used them for iPads when traveling, but never two iPads at the same time on one charger. No complaints other than the fact that the light is too bright.
I like it. I’ve never consciously used it to charge two iPads at the same time, but I’ve definitely used all the ports. It’s my “lives in my bag” travel charger.
One thing to be aware of with these is the “power delivery profile” charts. Basically, once you plug stuff in the amount of power that can go to any given port goes down, and it sometimes does so in a less-than-expected way. Note in the diagram below, for example.
You would think that getting 20w to two devices on each of the USB-C ports would be possible - but it’s just not. The top port will always be at least 40w, maxing out at 65w for a single device, with the second port capping at 12W as soon as you’re using two ports.
And the power on the bottom USB is going to be 12W max in two-port or three-port usage, even if you have 5W devices plugged into the two USB-C ports.
Not a huge deal - but if you’re charging an iPad Pro 12.9 and an iPad Mini, you want the Pro in the top port.
I also have 2 Minix P1 chargers. One of them has started to go buggy and doesn’t reliably charge on all 3 ports simultaneously, while the other one is working as good as new. I’ve moved the dodgy one to a place where it just has one cable plugged into it permanently behind a couch. I don’t NEED two of them with multiple ports, I just originally wanted a few high wattage USB-C chargers around the house, and one really good one for travel so I haven’t bothered to get a third one yet. I would look at what else is available before buying from them again, but the price means I would still consider them.