[Samsung Galaxy S10/S10+/S10 5G/E Cross Device Deve] AndrOdin:
Disclaimer by [MENTION=4610599]Ivan_Meler[/MENTION]:

/*
* Your warranty is now void.
*
* I am not responsible for bricked devices, dead SD cards,
* thermonuclear war, or you getting fired because the alarm app failed. Please
* do some research if you have any concerns before flashing!
* YOU are choosing to make these modifications, and if
* you point the finger at me for messing up your device, I will laugh at you.
*

The instuctions below asume you have an unlocked bootloader, which is mandatory, and if your bootloader isn't unlocked, please look here how to unlock it, and if the OEM unlock button is missing, also look here.

To flash modpunk's TWRP and vbmeta on S10e SM-970F Exynos international version, you need to:

1) Download the latest TWRP here.

2) Download vbmeta disabled image here.

3) Extract twrp-3.3.1-0-android-10.0-beyond0lte-5.img from the twrp-3.3.1-0-android-10.0-beyond0lte-5.img.xz with 7zip to fx. Desktop. 7zip can be found here.

4) Rename twrp-3.3.1-0-android-10.0-beyond0lte-5.img to recovery.img.

5) Rename vbmeta-disabled.img to vbmeta.img.

6) Place vbmeta.img in same place as recovery.img.

7) Open 7zip, and navigate to where vbmeta.img and recovery.img is placed.

8) Archieve vbmeta.img and recovery.img in one arhieve of .tar format (fx. TWRP.tar), and use "Compression level": Store.

9) Turn of your device

10) Press and hold the volume down and bixby (Not power!), and keep holding it, while connecting the USB cable between phone and PC.

11) When the download mode warning screen appear, release all buttons, and follow the instructions on the download mode warning screen.

12) Open up Odin3 v3.13.1 as admin, and you should se a message saying "Added" in the log, and a blue flag above ID:COM, together with a port number. Odin can be found here, or direct link here.

13) Press on AP in Odin, and navigate to where TWRP.tar is placed, and select it, so AP becomes checked, and the path to TWRP.tar is viewable in the AP slot.

14) Navigate to options in Odin, and make sure that "Auto Reboot" is NOT selected, and navigate back to the Log tab.

15) Press start to flash TWRP.tar.

16) When a success message is stated in the log, then exit download mode by pressing volume down and power.

17) When the screen turns of, you need to immediately press the recovery combo (VolumeUp, Bixby and Power), and keep holding it, until the secondary warning appears (The one with warning about unlocked bootloader), then release Bixby and Power, but keep holding volume up, until the TWRP logo is seen.

18) If you have entered TWRP, then go to bulletpoint 20.

19) If the phone fails to turn on after 10 seconds, then push power first and immediately after press bixby and volume up as well, until the secondary warning appears (The one with warning about unlocked bootloader), then release Bixby and Power, but keep holding volume up, until the TWRP logo is seen.

20) In TWRP, swipe slider to allow modification.

Since [MENTION=4297219]modpunk[/MENTION]'s TWRP support FBE, you wont be able to see your files through TWRP, until you format data, so:

1) Go to "Wipe" > "Format Data" in TWRP.

2) Enter "Yes" in the field to format the data partition/factory reset the device.

3) Go to the "Reboot" menu in TWRP and select "Recovery" to reboot your Samsung Galaxy S10e.

4) If the phone boots to TWRP again, then go to "Reboot" menu in TWRP and select "System".

If you also want to instal LineageOS as well, then:

1) Make sure the LineageOS flashable .zip file is placed on an external SD card.

and flash it while you are in TWRP, otherwise it will be wiped when formating the data partition/factory resetting the device.

2) Go to "Install" > "Select Storage" > "Micro SD card".

3) Navigate to where LineageOS flashable .zip file is placed, and press to flash.

4) Confim by sliding the slider.

5) After successful flash, then =>

a) If comming from stock or uncompatible ROM, do a full wipe (ART, Cache, Data).

b) If comming from same developper LineageOS, wipe (ART, Cache).

Just to have everything in one place, and to gain Magisk root by modpunk's Magisk boot image, then:

1) Download Magisk boot image for S10e to PC from (magisk_boot_ctc9_beta1.img.xz) here

2) Extract magisk_boot_ctc9_beta1.img from magisk_boot_ctc9_beta1.img.xz with 7zip, and place the magisk_boot_ctc9_beta1.img in root of your SD card on the phone.

3) Download Magisk Manager 7.5.1 from here, or direct link here.

4) Install Magisk Manager 7.5.1 on S10e, and don't wory about it not being instaled, when Magisk is fired up.

5) Turn of the phone.

6) When the screen turns of, you need to turn on the phone by pressing the recovery combo (VolumeUp, Bixby and Power), and keep holding it, until the secondary warning appears (The one with warning about unlocked bootloader), then release Bixby and Power, but keep holding volume up, until the TWRP logo is seen.

7) If you have entered TWRP, then go to bulletpoint 9.

8) If the phone fails to turn on after 10 seconds, then push power first and immediately after press bixby and volume up as well, until the secondary warning appears (The one with warning about unlocked bootloader), then release Bixby and Power, but keep holding volume up, until the TWRP logo is seen.

9) Navigate by pressing "Instal" > "Select Storage" > "SD card".

10) Press "Install Image" to be able to flash an .img file.

11) Navigate to where the magisk_boot_ctc9_beta1.img is placed, and select it.

12) Flash magisk_boot_ctc9_beta1.img by swiping the slider.

13) When flashing is complete, DO NOT do any other modification, navigate back to main screen, and select "Reboot" > "System".

14) Phone phone is started, enter Magisk Manager.

15) Magisk Manager will ask to do additional setup, and select yes to to confirm.

After auto reboot, there is no need for recovery combo to enter rooted system, that is now no longer needed.

Hope it helps :)

These are windows instruction, but I still hope someone can share knowledge about Heimdal.