To synchronize your new Home + Control home products, say to your Google Home speaker "Ok Google, synchronize my products", or scroll down the home page of the Google Home App to force the update. Your new products should now be available. If this does not work, follow these 2 steps:
1- Remove the Legrand Home + Control service: see the FAQ "How can I remove access to my"… with Netatmo" installation in my Google Assistant?".
2- Create the Legrand Home + Control service again: see the FAQ "How do I configure my "Google Assistant" to control connected products in my home?"