Actually it was supposed to be a feature in the S9 already but Samsung dropped it, so while Huawei was the first to implement it is hardly ripped off by Samsung.

but I had with Nexus 5 wireless charging years ago so they all ripped it off

Exactly, pretty sure Apple use Samsung's screen technology too. Copying this sort of feature is a good thing, can't say I've used it on my S10 but it's the sort of feature where it's better to have and not need than not have it and need it.