Redirect IP traffic with 'pfctl' on macOS
If your traffic is coming from your computer and since the destination isn't your computer the from can't be 127.0.0.1. The from IP  is the IP address associated with the interface to use to reach 10.20.154.24.

To make an easy test, just start by removing the part from 127.0.0.1 in your rdr rule, so as to catch all traffic tcp to 10.20.154.24 port 1111 which will include the one you want to redirect.

Next, and if this is necessary, check your outgoing interface IP address with:

ifconfig en0


(because I bet your interface is the WAN one, but adapt to your real case).