One of the most effective tactics here is to build a product marketecture. Building a marketecture will help you keep the integrity of the two products intact while being able to create a framework for the entire platform.
I've written a detailed blog on this topic, here: https://www.bizjournals.com/sanfrancisco/news/2020/09/15/polish-up-your-product-how-to-win-with-marketecture.html
In addition, the way to utilize the marketecture is to come up with the following levels of positioning and messaging.
Top-level: Platform positioning (marketecture is in service of this) - Here you describe how your platform will unlock value across multiple use cases for your target buyers in a single unified platform. Then follow up with why you can solve their problems uniquely better than other platforms.
Product 1 and Product 2 level: At this level, you can maintain somewhat independent positioning and messaging for your discrete products as long as the larger message still trickles down into the positioning for these products.
For some enterprise buyers, you may find starting with the platform story helps to set the stage in first call situations. For other smaller companies, the specific products may seem more attractive for an initial sales discussion - and a platform discussion may be counter-productive. As a PMM you will need to provide guidance to your sales team on when to leverage which positioning, platform vs product.