I believe that bilingualism is required by law. Many US product packages have repeats of the information in french.

Generally no. Some provinces officially operate in both English and French but some do not.

For a press release from a private company operating in Ontario there is no legal requirement to publish in both languages. Some companies might do so anyway if they have operations that are regulated by the federal government and/or they just want the goodwill.

Imported products have to meet Federal packaging laws, which do require both languages.

This really depends on the context, but in general bilingualism is only required for the public sector and adjacent things (such as federal standards around food packaging). A private company like Waymo certainly does not need to send out a press release in English and French.