Security risk
Study after study says that there's no official backdoor that the Chinese government could use. There doesn't need to be anything official. All that's needed is a known unpatched exploit.
Unfortunately, banning Huawei doesn't leave us with anything better. All home networking devices, especially security cameras, are garbage. They're a pile of stolen source code and bits of ancient Linux hacked together by the lowest bidder, and then re-branded and re-skinned for sale. The seller has no idea where the firmware came from or who should fix flaws.
If you want secure networks, you need to mandate maintenance of security.