Catalina download link not working

Posting again. I'm new in the community and have no idea how to edit my old post lol.

I have and old MacBook Pro 2013 with Mojave that I need to update to Catalina. When trying to use the direct link to download Catalina the App Store doesn't open. Instead it opens a browser link with the description of the OS.

I tried the link from my 2021 MacBook Pro 14" with Big Sur and it worked in that Mac. Any idea how I can make the link work on my 2013 Mac with Mojave or another way to download Catalina?

Any help will be very much appreciate it :)

Thanks!