Check out AirMessage, you can set it up on your Mac and as long as it's connected to the internet, you can use the AirMessage app to get iMessage on an android.
Alternatively there's Bubble but that requires you to Apple sign in to their system and didn't seem very safe but it doesn't require a mac
I've always wondered but for all the hate Valorant gets, do you feel like their anti-cheat has reduced the amount of cheaters you experience as compared to other games?
FWIW I haven't played much Valorant