To address this problem, Google is introducing a new Samsung modem in the upcoming Pixel 9 and Pixel Fold 2. This new modem is expected to be not only faster and more energy efficient but also support innovative features like texting via satellite connections or 5G non-terrestrial networks (NTN).
Images credit: Google News Telegram channel
According to the source, you will need to move your phone to center the satellite in the circle, and the process is illustrated by the accompanying animations in the UI. These instructions can also be minimized into a floating window, so you can potentially keep an eye and use both the instructions and your messages window.