Does it apply to my business?
If you sell to other businesses or to government entities, almost certainly yes, eventually. The guidelines put business-to-business and business-to-government transactions in scope. Sales to consumers (B2C) are excluded until further notice, so a café that sells only to walk-in customers is not yet affected for those sales.
There are specific exclusions, including certain airline documents and exempt financial services. A natural person acting outside business is out of scope, and an investment holding company with only passive income is treated as out of scope unless it has business transactions.