Download Citrix Workspace from

• https://www.citrix.com/downloads/workspace-app/linux/workspace-app-for-linux-latest.html

# as root
MYUSER="myuser"
rpm -i /home/$MYUSER/Downloads/ICAClient-suse-21.4.0.11-0.x86_64.rpm

then install (possibly) required ca-certificates to /etc/pki/trust/anchors and link them into Citrix certstore

cp -av /home/$MYUSER/path/to/certificates/. /etc/pki/trust/anchors/
update-ca-certificates
cd /opt/Citrix/ICAClient/keystore/cacerts/
# repeat for each required certificate
ln -s /etc/pki/trust/anchors/example.crt ./example.crt

that should do the trick…