Is it possible to install |e| and keep the TWRP recovery that is allready installed and working.
I only see |e| packages that bring the |e| recovery with them.
It’s about my Fairphone3+
Regain your privacy! Adopt /e/ the unGoogled mobile OS and online services
No. Installation of /e/OS will install /e/OS recovery.
Feel free to install TWRP again afterwards, but in this case don’t lock the bootloader (after assessing accompanying security implications), else /e/OS will not boot.
Every /e/OS update afterwards will restore /e/OS recovery.
You can boot TWRP temporarily when needed without installing it, but in this case don’t lock the bootloader (after assessing accompanying security implications), else you can’t boot anything other than the installed OS.