So UConnect called me after Ramcares private messaged me on the issue. Per UConnect, it is a problem with the Panasonic radio not currently having the feature to be able to do voice to text. He said it isn't limited to current Rams, but any new vehicle using the new Panasonic radio. He said models before 2019 can do it, but not our 2019s yet. He said they will pass up the info that it is desired and hopefully a software patch can enable it again. So I would certainly contact UConnect and let them know you want the feature. Enough clamoring and maybe they update it. Until then, Android Auto/Apple Car Play are the only options to avoid the predefined messages.
Similarly, the microphone that is grayed out in Navigation is the same issue. However, he said you can use the voice recognition button on the steering wheel and say "Find Address" and get info that way. In testing this, you have to be exact with your address, and give the entire address. It sometimes could find a general POI, such as McDonalds, but failed miserably trying to locate something like Bass Pro.