Phone Wallet Cannot Connect to Local Node

I'm running the Mac GUI Wallet (on an M1 MacBookAir) and have downloaded the full node. The wallet launches and runs fine, the daemon syncs, obviously, the node can mine, and the wallet on the MBA can receive transactions from my phone. However, I cannot add the MBA's node to the wallet on my phone -- the MBA node IP address stays red, in two different apps. The apps are able to use other nodes (green) without issue.

The local firewall on the MBA is turned off. Restarting the phone and the laptop do not resolve the problem. I have reconfirmed that I am entering the correct IP address on my phone. If I start the daemon by entering the "--public-node" under "Settings > Node > Daemon startup flags", the daemon tries for 120 seconds to start but then reports that it cannot do so. The log says that it "couldn't connect to daemon: 127.0.0.1:18081".

GUI version is 0.18.3.4-release, Embedded Monero version is 0.18.3.4-b089f9ee6. Guidance appreciated... thanks!