It has several questions where the answers say that it only works with Huawei and also say the product details:
Matching brand: Huawei
What did you expect?
Unfortunately, we cannot guarantee this compatibility 100%. We can only guarantee 100% compatibility with the Huawei Mate 10 Pro, for which the adapter was also designed.
The Huawei P30 Pro has a USB C port. So that should fit.
Of course, it could be that it doesn't work. Therefore: Unpack it cleanly (do not tear open the packaging), test it and send it back to Digitec if it does not work.
Well: I don't know if it works specifically with the Insta360.
However, I have tried it with the Huawei Mate 20 pro. Although all headsets and headphones work, the connection to a dedicated microphone does NOT work.
Tests with other TB and USB C ports on PCs have shown that neither microphones nor headphones can be connected to the ports.
So I wouldn't try it...
With my Huawei Mate 10 pro, I can connect third-party headsets (in this case, rather old Nokia headphones with a mic) to the adapter and mic input works without any problems.