I am trying install windows on my Mac and it says bootcamp can not be used on this Mac

The M1 range of clip sets can't currently install window via Boot camp.

The only way to run Windows is within a VM within Parallels . Specifically Windows 10 or 11 insider versions of the Arm implementations.

Caution this is not an approved method according to Microsoft and therefore not licensed for anything commercial.

The improved M1Pro and Max chipset do work surprisingly well for many software titles , however anything needing graphics acceleration or requiring dongles not so much.

Some complex data bases and corporate software may not work as expected or at all.

Until Microsoft determine their licensing and distribution policies for Windows 11 Arm use can only be said to be at your own risk.

Because Windows won't run on an M1 chip. You'll need an emulator like Parallels.

You also would need the Insider Preview ARM64 version of Windows 11.