I don’t know if this is a feature or not, but I am able to change the system volume using Fn + F9/F10 to change system volume on my laptop on all my computer applications, such as Studio and Chrome, but it doesn’t work on ROBLOX, as you have to click out of the client to change the volume.
It sounds like I am a really lazy person reporting this, but it does get a tiny bit annoying when I have to click out of the client to solely change the volume.