@space_cool
Thank you for listing the phone model. Huawei P20 Pro is being used successfully by members in this thread. Let’s assume for a moment that the phone is not the issue.
Is this the Nexgim exercise bike you have? It is not on Zwift’s list of supported trainers. The specs say “Bluetooth 5.0,” but this does not mean that the bike is designed to work with Zwift in mind. There are exercise equipment companies that make Bluetooth-capable products that only work with their own proprietary fitness apps.
Wish I had better news for you, but we can’t say that this bike will work.