If you’re both using Apple devices it works like this:

Guest: “What’s your wifi network?”

Me: “It’s XXXX”

Guest: selects network

Me: Prompt on my device “Would you like to share your wifi password with Guest” . Selects Yes

Guest: “oh wow I’m connected. Thanks!”

Now that only works if I am present. But it works wonderfully. It should be standardised across platforms.