Installing roblox to linux is used to be hard because roblox banned wine. But here is an easy way now.
1. Download the ".flatpakref file" Download sober.flatpakref by clicking simply at this link: https://sober.vinegarhq.org/sober.flatpakref .
2. Open it by simply clicking on it Once you opened it the software should open."
3. Download it Click to the install button.
4 Open it Once installed, open the application. A menu will pop up.
5 Click use automatic install
The installation may take a few minutes.
And you are done