@Cableguy ...
When an app is withdrawn from sale the
store webpage becomes inaccessible to new purchasers. Only those who purchased it previously can login, navigate to the page and reinstall their purchase.
There comes a stage where updates to the OS have been so many and varied that a user simply cannot expect his new Android 12 cellphone to work with software dating from Android 4. The author's obligation to provide support cannot continue forever.