Why there is no native QIP for Apple Silicon
QIP 2005 and QIP Infium were built for Windows and were never released for macOS. Apple Silicon makes this harder, not easier: legacy x86 emulation layers run slower and are not always fully supported by Wine/CrossOver on M1-M4, so even emulation is less reliable than it was on Intel Macs.
What to use while the Dart client is in development
The fastest option is the web widget on https://jimm.online — it runs in the browser with no installation and gives you UIN login, a contact list, and chat. If you specifically need a desktop QIP window, the only current option is Windows emulation via Wine, CrossOver, or a virtual machine, with no guarantee of full stability.