Hello,
Thank you for the screenshots.
Is this a custom built computer?
If so, did it originally come as Windows 11?
You need to find the license key. The 25 digit key that ends with MP2KC. The builder/seller should have provided you with that key. Sometimes they apply the sticker somewhere on the computer, see if that's the case. The sticker should have the key on it.
Then go to Settings > System > Activation > Change product key to input the license key.