You cannot simply “rename” a 7z file to .bin and expect it to work. Instead, you must and then create a BIN image from its contents.
7-Zip (Windows), Keka (Mac), or p7zip (Linux). how to convert 7z to bin
If your .7z file contains a game or system file, the .bin is likely just compressed inside it. You cannot simply “rename” a 7z file to