A lovely person at a convention complimented me thru text and I was so awkward🧍

Once at an anime convention, I was waiting in line to buy a ticket and this sweet person near me showed me their phone, and on it it was written "I love your mask!! ❤️❤️" And I just did a thumbs up and said "thank you!" And idk if they were deaf or mute or something?? Or if they were nonverbal because of all the noise around??? What if they were deaf and all they saw was me doing an awkward thumbs up and saying something they couldn't even hear like my mask was only covering down to my upper lip so they could've seen it but????!? 😭😭 I'm overthinking this bro maybe I should've answered in sign language?????? Would they have understood????????? GRJSIRHREK IDK IF THAT WAS THE RIGHT THING TO DOOOO