Dependencies like Telerik UI for Blazor & AutoMapper increase development velocity. However, they increase the application startup time. I created sample applications to illustrate the difference:

Device / Load Time (ms) Without AutoMapper (source code) With AutoMapper (source code)
MacBook Pro 2015 200 350
Samsung Galaxy A31 600 1800

The increase in startup time is pretty drastic on devices with limited processing power, so if you are creating a Blazor WASM application for external usage where you have no control over what devices users use to access your application, then you should consider removing unnecessary dependencies from your application.