I recently switched from the Card Travel Adapter 4-Pro you’ve been using (I’m the one who turned you on to it!) to the Mogics MA1, specifically the newer MA1-B variant (it works with more EU plugs than the original). It has the same plugs as the Card adapter, but in the smallest possible package you can imagine and weighs only 28g. I then plug a small USB-C GaN power adapter into it. It turns out I only need one USB-C port to charge a handful of devices because I don’t normally need to charge them simultaneously (and if I do, I can pass-through charge some of them), and I’ve switched all my cables to be USB-C at the adapter end.

The total size of the two devices is significantly smaller and lighter than the Card adapter. I think Card and Mogics are the same company, actually.