MacOS Sequoia, problem with boot windows 7

Good day, I would like to ask, I installed MacOS Sequoia using OpenCore on a MacBook Pro 15” 2015, and everything works as expected, however, I cannot boot Windows from an external SSD after installing MacOS Sequoia. Using the “Alt” (option) key, I don’t see the option to select the Windows system. I can see it directly in MacOS, I try to set Windows as the boot disk, but it doesn’t work. After restarting the MacBook, it still boots MacOS. Can you help me? Thx