MacRumors published a story that Apple has released the second beta of iOS and iPadOS 13.4.5 to registered developers.

Apple Seeds Second Betas of iOS and iPadOS 13.4.5 to Developers

Apple today seeded the second betas of upcoming iOS and iPadOS 13.4.5 updates to developers, two weeks after seeding the first betas and a month after releasing iOS and iPadOS 13.4 with iCloud Folder Sharing, iPad trackpad support, and more.

  Apple Seeds Second Betas of iOS and iPadOS 13.4.5 to Developers