ARM32 Bullseye Raspian Seeking for info on How to run script on boot/load. Tried for 3 weeks long

Hellô, I'm tring to run this command on BOOT: this would be my optimal command [ sudo lxterminal -e "sudo ./Chataigne-linux-armhf-1.9.17.AppImage" ] since it loads a terminal with privileges and then opens the app with privileges as well. I've tried with rc.local, systemd and other common methods listed on the web (I think I can read and try all the lines written there but none seems to work), the closest I've suceeded is with bashrc so when i open a terminal, is automatically call the appImage. Thanks in advance for any help. Image