Any experience with dog carriers / harnesses / backpacks?

[Wheelie]

So, my daughter is getting a tiny dog (5 kgs?).

Are there any recommended solutions for carrying the dog on the bike? On AliExpress (among others) there are various solutions on offer (i.e. search for "motorcycle dog carrier").

Whichever solution I get, it must be comfortable for the dog and also keep it secure... Any experience with any such solutions?

I think it would probably be most enjoyable for both rider and dog if the dog was to carried it on the riders body rather than the bike - probsbly the chest, but maybe the rider's back would be just as good? I am however worried that some carrying solutions may cause too much restriction of blood flow, or be both harmful or painful to leg/shoulder/hip joints, or even the tail - but I really have no clue. I've never had a dog before even remotely this small and don't know wether the dogs low weight plays a role for the dog's comfort. Even if I was willing to carry it, for the dog's sake, I certainly wouldn't let a heavy dog of 30 kgs hang in a harness for any lengths of time.

I also think the dog ought to have some goggles, even though the dog would be tucked fairly well behind the wind screen or my back? Maybe even a helmet to prevent the ears from flaping too much around so to protect its hearing? What fo you think?

Or is all of this just a terrible idea?

When I was in my teens a friend of mine would ride around on his moped with his dog in a simple backpack (no goggles or hat/helmet). The dog seemed to enjoy it a lot ~ but then again, the moped maxed out at 50 km/h and the rides were never longer than 30 minutes or so. I will be riding twice as fast, sometimes for hours (a stop every hour).

I don't think I would go for s simple backpack like my friend did - this as I would be worried about the zipper coming undone or the dog jumping out).

Maybe a solution that was on the pillion seat or the tank would be better?

Please advice. Any thoughts are welcome.