Surprising as it may seem, there is every possibility that the QHD monitor that you are using right now might in fact be a 4K panel. Supply shortages mean that OEMs could simply install a 4K panel, which are now almost as expensive or even cheaper than QHD panels and still be able to limit the output resolution via firmware. But how does one know whether the monitor has a native QHD panel or a 4K panel and does it affect regular usage?
https://www.notebookcheck.net/Your-1440p-QHD-monitor-might-be-actually-housing-a-4K-UHD-panel.310986.0.html