Hello, Anonymous2021tt. Thank you for posting to the Apple Support Communities. We understand your situation and how you are eager to install this app to your new iPhone. We’re happy to help you look into this.
To get started, there are several Apple Support articles that we would like to provide you with. These articles contain the suggested troubleshooting steps to try first if you are noticing an issue connecting or downloading apps from the App Store:
Download apps and games on your iPhone or iPad - Apple Support
If you can't connect to the App Store, iTunes Store, or other Apple services - Apple Support
According to the articles above, something like this could be related to your account billing information or payment history. You should also find instructions for confirming the date and time settings of your device, and that your device has the latest system software installed. If you continue to notice an issue, it may also be helpful to change to a different network connection before trying to install the app again.
For even more help, you can contact Apple Support directly. Depending on your location, you may be able to contact Apple Support using the following link:
Get Support
We hope that this information helps you install your favorite apps to your new iPhone. Please let us know if you have any other questions about this topic.
We hope that you have a great day!