Backup the /recovery partition have no interrest, you can find it included into your device firmware (files easily available through samsung’s fan sites).
For exemple
https://samfw.com/firmware/SM-G970F
Your /data partition is were your installed apps and preferences are stored, it can be usefull to backup /data partition. TWRP could do this.
The internal storage (also called /data/sdcard) is the special part of /data that you are used to acces via files-manager. It contains your stored documents and some app needed files.
You can copy it without special tools. (but it is not included in a TWRP backup).
https://forum.xda-developers.com/galaxy-s10/samsung-galaxy-s10--s10--s10-5g-cross-device-development-exynos/recovery-twrp-galaxy-s10-e-5g-exynos-t4180287
You can install /e/ without installing the recovery-e, but any other custom recovery manager as i prefer to use TWRP (Team Win Recovery Project)