Covid disinfectants can kill the Covid virus and its variants. However, before a disinfectant company introduces a disinfecting cleaner to the market, the EPA must authorize any claim of their product killing a specific pathogen before the company can put it on the label and register the product. Some companies can make efficacy claims not appearing on the product label if they follow the EPA's Emerging Viral Pathogens policy.
Suppose a company elects to test its disinfectant cleaners against variants of the virus. In this case, the EPA will give the company permission to claim that its cleaner kills the variants on the product label, provided the claims have verification from creditable science and testing data.