Was anyone aware that the government had already taken these powers? This is an extension of the powers. Why would DNA profiles need to be kept? Who will keep them? What will be done with them?

The Coronavirus (Retention of Fingerprints and DNA Profiles in the Interests of National Security) (No. 2) Regulations 2020

https://www.legislation.gov.uk/uksi/2020/973/made?view=plain