Latest development was this …
For me, this release can decrypt the Android 13 /e/OS data partition, but not the Android 14 /e/OS one.
(Reminder: TWRP needs an unlocked bootloader to be booted in fastboot mode. Locking as well as unlocking the bootloader will force a factory reset, wiping user data.)
Looking at the state of things overall, TWRP sadly is dying as a backup option.