Owncloud-client install for Raspberry Pi OS 64 bit fails with Package 'owncloud-client' has no installation candidate

owncloud-client install for Raspberry Pi OS 64 bit following
https://download.owncloud.com/desktop/ownCloud/stable/latest/linux/download/

fails with message

Package owncloud-client is not available, but is referred to by another package.
This may mean that the package is missing, has been obsoleted, or is only available from another source

E: Package ‘owncloud-client’ has no installation candidate

System info:
uname -a
Linux pichef 5.15.32-v8+ #1538 SMP PREEMPT Thu Mar 31 19:40:39 BST 2022 aarch64 GNU/Linux

cat /etc/debian_version
11.3

We do not provide packages for ARM, neither 32-bit armel nor 64-bit arm64. In the long term we might be releasing AppImages for these architectures, but we are not going to implement traditional Linux packaging for ARM devices.