i386 .deb ti fungovat nebude, jelikoz jde o zcela rozdilnou architekturu, potrebujes neco co ma na konci Arch nebo ARM64/r AArch64 v pripade 64Bit verzi.

https://sourceforge.net/projects/freepascal/files/Linux/3.2.2/fpc-3.2.2.arm-linux-raspberry-2.tar/download

Coz znamena :

sudo wget  https://altushost-swe.dl.sourceforge.net/project/freepascal/Linux/3.2.2/fpc-3.2.2.arm-linux-raspberry-2.tar
sudo tar xvf fpc*
cd fpc-3.2.2.arm-linux
sudo ./install.sh