I'm sure some of them would, but they're not required by law to do so. And historically the way you'd do this is by actual fragment/substring matches. But these are novel viruses now. So what you really want to do is try to predict whether a novel genome is pathogenic... which is itself obviously a very hard technical problem.

That’s not too much a concern I think. Most of the real pathogenic qualities result from known genes. Inventing a totally novel virus that is also pathogenic is basically science fiction right now. Splicing together known components that could be bad in combination is closer to current technology.