AMD Drivers: if your GPU is new enough (which it probably is since you're playing Star citizen) it should be just magic here since they come together with the kernel.

Chrome: it's available for Linux, no need to switch. Although Firefox is very nice too.

Gmail: not sure what you mean, Gmail is a website, those are available on any platform. If you meant a desktop email client (which honestly I have never in my life used) there's Thunderbird.

Office 360: Are you talking about Microsoft 365? Is that not a website too? In any case Libre office is a nice alternative to the classical Office desktop app too in case you want that.

I-Tunes: A quick search online reveals people use wine to run the Windows version of iTunes, although I would probably consider migrating. Spotify has a native client and there are some places where you can buy music and have it locally for playback.

JBL: not sure what this is other than a brand for speakers.

Anti-virus: You almost assuredly don't need an anti-virus on Linux, as long as you install software through the proper channels (i.e. using the package manager) chances of virus are so small it's not something to worry about. Most Linux anti-virus serve to check windows binaries in the system to avoid someone using the Linux machine to send virus to Windows users.

PyCharm: it's available for Linux

Remote desktop to iOS: Not sure this is possible even on Windows, I use remmina for remote desktop, it supports several ways of connecting to the other device so maybe see if it works for you.

Star citizen: Never played it but it seems to be playable with Wine.

Steam: While steam is available not all games are compatible, check out https://www.protondb.com/ to see the status of any specific Steam game.

VPN: should be native on Linux, there's a protocol caller OpenVPN which most VPN providers will give you a Config file for that you can use directly on the network applet on Linux.

PS: Next time share the list in text, it makes it easier to reply