While there is no single "official" corporate portal for independent developers, the software is commonly hosted on reputable third-party mirrors and developer forums.
If you still wish to proceed, links are typically distributed through these channels: Third-Party Repositories: Sites like Software Informer ifast22 software download link
If you are locked out of your device, the only secure methods to remove an Activation Lock are through official Apple channels: Reset Your Password : If you forgot your credentials, use the Apple Account Recovery Remove via iCloud : If you can't access the device, sign in to iCloud Find My from another device to "Remove from Account". Apple Support Request While there is no single "official" corporate portal