Recently I've been trying to play a game (Combat Arms) and while trying to launch it tells me "you must have a video card that supports TnL" I really wish to know if my card supports it, or it does and it's a feature you can fix.
TnL means this: Hardware Transform & Lighting. The RX580 should have this feature.
Here is Wikipedia explanation of T&L: Transform, clipping, and lighting - Wikipedia
Here is the latest AMD RX580 AMD Driver: https://www.amd.com/en/support/graphics/radeon-500-series/radeon-rx-500-series/radeon-rx-580
Here is your game's website: Combat Arms: Reloaded
Try asking your question here at your game's Forum website for technical issues: https://forums.valofe.com/forum/combat-arms-reloaded/help-and-support-aa/technical-issues-aa
Make sure the game has the latest Patches installed.