I just installed Ubuntu 26.04 and tried to install the Zabbix 7.0 repo, but the zabbix-tools repo prevents it. Ubuntu states the following error after adding it:

Error: The repository 'https://repo.zabbix.com/zabbix-tools/debian-ubuntu resolute Release' does not have a Release file.
Notice: Updating from such a repository can't be done securely, and is therefore disabled by default.
Notice: See apt-secure(8) manpage for repository creation and user configuration details.

I installed from this url: https://repo.zabbix.com/zabbix/7.0/ubuntu/pool/main/z/zabbix-release/zabbix-release_latest_7.0+ubuntu26.04_all.deb

When deleting the /etc/apt/sources.list.d/zabbix-tools.list, it can continue. So there is a fix needed to also support Resolute Raccoon (26.04)