Bing found the following results
Cross-platform software - Wikipedia
What Does Cross-Platform Mean for Gaming and Other Apps? - How-To Geek
Cross-platform play - Wikipedia
Beyond native: An overview of cross-platform development
List of video games that support cross-platform play - Wikipedia
What Is Cross-Platform Play in Gaming and How Does It Work? - MUO
Cross-platform - Simple English Wikipedia, the free encyclopedia
Cross-platform play - Wikiwand
What do cross-play, cross-platform, cross save, cross
What is Cross-Platform? Definition, Types & Examples - Techopedia