Hi Rob, I have a Pi4 with 8GB of Ram, but it does appear that its armhf archictecture
stellarmate@stellarmate:~ $ uname -a Linux stellarmate 5.10.63-v7l+ #1496 SMP Wed Dec 1 15:58:56 GMT 2021 armv7l GNU/Linux stellarmate@stellarmate:~ $ sudo dpkg --print-architecture armhf