You don't need an actual physical raspberry pi to temporarily run pihole on your LAN, you can, for instance, install a barebones debian VM inside any common hyp

You don't need an actual physical raspberry pi to temporarily run pihole on your LAN, you can, for instance, install a barebones debian VM inside any common hypervisor on your laptop like virtualbox or qemu, then install pihole on that basic debian x86-64 system.