TecMint published a tutorial about installing multiple Linux distributions using PXE network boot on RHEL or CentOS 8.
Install Multiple Linux Distributions Using PXE Network Boot on RHEL/CentOS 8
PXE Server – Preboot eXecution Environment is a standardized client-server architecture that instructs a client system to boot, run, or install multiple Linux operating systems using a PXE-capable network interface on your network infrastructure.
Install Multiple Linux Distributions Using PXE Network Boot on RHEL/CentOS 8