https://wccftech.com/apple-seeds-beta-8-of-ios-14-ipados-14-watchos-7-and-tvos-14-to-developers/

Today, Apple has seen fit to release beta 8 of its upcoming iOS 14, watchOS 7, and tvOS software which will potentially release sometime this month. The beta builds are released to developers a week after the seventh beta was seeded.

If you're a developer and want to download beta 8, you can register yourself through Apple's beta testing program. Once you do so, you should install the appropriate configuration profile for the software that you want to test.