2.4GHz WAN and PiFi network

I need to set up the PiFi to run on a 2.4GHz internet connection (no cable possible), and also to broadcast the “safe” network on 2.4GHz. The context is that I need a baby monitor that only runs on 2.4GHz and the resort that I’m going to only has a 2.4GHz WiFi network.
I’ve set up the PiFi with the official dongle. I can connect to a 2.4 GHz network OR I can set up the “safe” network as 2.4 GHz. Not both.
Is there a way to get both running on 2.4 GHz?

I’ve popped you an email in this case because I think there could be some potential follow-up questions

Once we have worked out a solution I can pop it here if anyone else has a setup that needs to force 2.4Ghz both for wireless pairing + access point (which isn’t the default for performance reasons)