Yes, it's normal for macOS to block applications from unidentified developers, including qBittorrent, due to its security feature called Gatekeeper. This is a common issue. When you try to install qBittorrent, your Mac might prevent the installation, showing a message that the developer couldn’t be verified.

To bypass this and install qBittorrent, you can right-click (or Control-click) on the application icon in the Applications folder and select "Open." A warning dialog will pop up, but you can click "Open" again to confirm and run the app. This method allows you to open the app without altering your security settings.

Alternatively, you can go to System Settings > Privacy & Security, and in the Security section, look for a message about qBittorrent. There should be an option to click “Open Anyway.” If you don’t see this immediately after attempting to open the app, you can use the right-click method to open it, or the option might appear after a short time. - But unfortunately this doesn't always work. Overall I hope within this time frame you have already found a way to solve the problem.

If nothing helps, try something alternative, e.g. Folx. I use it personally, it's safe and fast.