ubuntu with arm64

can we install CWP under Ubuntu V23.04 with arm64?

CWP still references CentOS, even though they are abstracting it to be Control Web Panel. It currently requires an EL7 or EL8 distribution.
https://control-webpanel.com/installation-instructions#step2

3. Software Requirements
You must have a clean/fresh installation of supported operating systems:
CentOS 7 MINIMAL is recommended version. (RECOMMENDED STABLE)
The best version to be used with CWP as it provides the most features and CWP Secure Kernel.
CWP-CentOS 8 MINIMAL or BOOT Stream-Delayed. (RECOMMENDED LATEST)
We have our custom repositories making CentOS 8 Stream a stable version. More Info
CentOS 8 Stream MINIMAL or BOOT
Direct installation or converted from CentOS 8 Linux. (Recommended)
Rocky Linux 8 MINIMAL or BOOT
Compatible but with possible issues, Recommended is to use CentOS 8 Stream or CentOS 7
Alma Linux 8 MINIMAL or BOOT
Compatible but with possible issues, Recommended is to use CentOS 8 Stream or CentOS 7
Oracle Linux 7 & 8 MINIMAL or BOOT
Compatible but with possible issues, Recommended is to use CentOS 8 Stream or CentOS 7

and under Centos 8.4 with an ARM64 processor?

I would not recommend CentOS Stream 8, as it is EOL soon. Look toward AlmaLinux 8.8, as you can then ELevate to v9 when CWP fully support EL9 distributions (hopefully soon, per the devs).