You have to contact the Adobe support and ask for the installation files for the appropriate version of Lightroom Classic that matches with your operating system. In the Creative Cloud Client you are only the previous version (13.x) available.
Please click the link below to contact Adobe staff to help.
Be sure to remain signed in with your Adobe ID before accessing the link below.
You have to allow 'cookies' in your web browser for this to work
https://helpx.adobe.com/contact.html
Click the chat icon in the lower right and type "agent" to get a human and not the chat bot.

Also - beware of answering anyone who sends you a private message or an email.
https://community.adobe.com/t5/community-help/avoid-phishing-3-easy-ways-to-identify-adobe-staff/td-p/10791730
My System: Intel i7-8700K - 64GB RAM - NVidia Geforce RTX 3060 - Windows 11 Pro 26H2 -- LR-Classic 15 - Photoshop 27 - Nik Collection 9 - PureRAW 6 - Topaz Photo AI