Ace wasn't wrong when he said that people are worried about him... After all, his live broadcast is being aired everywhere that their technology can reach. Everyone who is watching is definitely aware of his identity or at least heard his name...
His death would also create a huge setback to the current forces he has and the magicians here would be in a precarious situation...
[ The announcement of your current status has been completed. ]
"Good... Connect me to the Moon Base's Command Center." Wallace said to the floating metal ball.
[ Affirmative... Connected. ]
"Wallace... Is that you? Can you hear me?" Escanor's familiar voice can be heard. They only have an audio connection so he couldn't see the person behind the connection.
"Yes..."
"Whoa! You're safe... The live broadcast just ended after the massive explosion. Everyone is worried about you... Right, what can I do? Just let me know..."