So I ended up solving the issue for both the special keys on the right and the inability to type € using Sharpkeys. Essentially, I was missing the Alt Right key, preventing me to type € and even @ for how the ITA layout works. I changed the Ctrl Right for Alt Right and I was good to go. Powertoys software didn't allow me to do so, and VIA does not support my keyboard at all.

Pgup, Pgdn, and Home were remapped as well. I will look for artisans' or blank keycaps for those, though, since the Pgup key is the same height as the RGB control key, and it's a punch in the eye to look at, personally.

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Thanks to all who actually tried to help me. But I will avoid seeking help on this subreddit next time. Maybe it was my fault for the title I chose, but too many smartasses misunderstood my post.

https://preview.redd.it/yccke2bnnn7a1.jpeg?width=1280&format=pjpg&auto=webp&s=3ea3d9cfc7d057bc3f36c7730a5b7d5da968d64d