That is correct. Pharma can run "informational" ads for EUA products, but there are required disclaimers, e.g., stating that the product is not approved, is only authorized for emergency use, etc.

Per the Letter of Authorization dated May 10, 2021,

"All descriptive printed matter, advertising, and promotional material relating to the use of the Pfizer-BioNTech COVID 19 Vaccine clearly and conspicuously shall state that: • This product has not been approved or licensed by FDA, but has been authorized for emergency use by FDA, under an EUA to prevent Coronavirus Disease 2019 (COVID-19) for use in individuals 12 years of age and older; and • The emergency use of this product is only authorized for the duration of the declaration that circumstances exist justifying the authorization of emergency use of the medical product under Section 564(b)(1) of the FD&C Act unless the declaration is terminated or authorization revoked sooner."