On September 13, 2021, it was reported that ExpressVPN had been acquired by Kape Technologies, an LSE-listed digital privacy and security company

F-Droid can do unattended installs, you just need A13+ and the basic client.

NOTE: The Basic version of F-Droid Client has a reduced feature set (e.g. no nearby share and no panic feature). It targets Android 13 and can do unattended updates without privileged extension or root.