(base) jami@jami-HP-Laptop-15-bs0xx:~/Downloads$ chmod +x boinc_7.4.22_x86_64-pc-linux-gnu.sh
(base) jami@jami-HP-Laptop-15-bs0xx:~/Downloads$ sudo sh boinc_7.4.22_x86_64-pc-linux-gnu.sh
[sudo] password for jami:
use /home/jami/Downloads/BOINC/run_manager to start BOINC
(base) jami@jami-HP-Laptop-15-bs0xx:~/Downloads$ /home/jami/Downloads/BOINC/run_manager
./boincmgr: error while loading shared libraries: libwebkitgtk-1.0.so.0: cannot open shared object file: No such file or directory
WHY it's NOT included ?
WHERE can I get it ?

(base) jami@jami-HP-Laptop-15-bs0xx:~/Downloads$ chmod +x boinc_7.4.22_x86_64-pc-linux-gnu.sh
(base) jami@jami-HP-Laptop-15-bs0xx:~/Downloads$ sudo sh boinc_7.4.22_x86_64-pc-linux-gnu.sh
[sudo] password for jami:
use /home/jami/Downloads/BOINC/run_manager to start BOINC
(base) jami@jami-HP-Laptop-15-bs0xx:~/Downloads$ /home/jami/Downloads/BOINC/run_manager
./boincmgr: error while loading shared libraries: libwebkitgtk-1.0.so.0: cannot open shared object file: No such file or directory
WHY it's NOT included ?
WHERE can I get it ?

Don't go for the run file.
Either download and install the .deb file: sudo dpkg -i --force-depends boinc(whateverversion).deb
or,
add the development repositories:

sudo add-apt-repository ppa:costamagnagianfranco/boinc
sudo apt update
sudo apt install boinc

Thanks for answer, but I got a new error
gui_rpc_auth.cfg can't be read,
i try to fix myself

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No need to try to reinvent the wheel, just follow the advice in https://boinc.berkeley.edu/forum_thread.php?id=14023

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