Modified APKs or EXEs can contain malware, keyloggers, or adware. Since mirroring software requires deep permissions (accessibility and screen recording), a compromised mod could see everything on your screen, including passwords.
Install the ApowerMirror desktop application on your Windows or Mac computer.
Additionally, always download mods from reputable sources. Since these are modified APKs or installers, ensure you have a robust antivirus program active to scan the files before installation.