Here is a step by step instruction for installing centos 8 on Raspberry Pi 4. Basically you just need to burn the centos 8 aarch image to the SD card and it should work out of the box.
Hi, I got an rpi 4 a couple days ago and installed centos 8 on it. It has chrony installed and every time I reboot it I see chrony resync time with NTP for huge gap, as below: messages:Jun 22 07:11:53 raspberrypi chronyd[243]: chronyd version 3.5 starting (+CMDMON +NTP +REFCLOCK +RTC +PRIVDROP +SCFI...