Check back in ten years
They'll be fine. They have an enormous domestic market, many eager customers in the developing world where the Writ of Trump does not run, and just a temporary problem in some Western countries. Come back in ten years and you'll see that they will have the benefit of a major new semiconductor supply chain in China itself. The companies like Ericsson who may benefit from the US/China trade war today will be wiped out tomorrow.
British telcos will be running mainly Huawei kit ten years from now.