You might want to buy an endoscope on AliExpress, they're super cheap. The problem looks bad on your pictures but without a pic from inside it's hard to be sure. It does look the carbon matrix isn't infused with resin, which would be a red flag. However, a better picture is needed.
On balancing wheels, bear in mind that a tubeless valve weighs much more than a tpu valve, so I always balance my wheels with lead weights (on AliExpress as golf club lead weights for cheap), sometimes it's needed, sometimes it's not. Obviously, if the wheel is wildly out of balance, then that's a red flag.
I've ridden bikes with the wobble of death, scary AF, so wheel balancing is a good insurance policy.
