Google to this day is still not satisfied with Apple for not wanting to integrate the RCS system in iMessage. According to Google, they already have evidence that RCS is a more secure and complete messaging system than the problematic iMessage.
Google wants Apple to stop using green and blue bubble messaging so that all users can enjoy a more comprehensive messaging experience. Two months ago, Google mocked Apple with Drake's song Text Go Green.
Recently, Google publicly shamed Apple through a dedicated website inviting people to help Apple realize and accept the message they want to convey, which is to start using more secure RCS. They're trying to get @Apple's message out #GetTheMessage
This website also shows all the drawbacks of iMessage such as not being able to send messages to Android devices if there is no WiFi, small image size, security issues, and more. Google also ran campaigns on TikTok and Twitter inviting people to "help" Apple start this transition.
In fact, Google also tells people to use Signal or WhatsApp as an alternative to iMessage.