The Azeron and reWASD software are Windows only, unfortunately. That said, there is storage for two profiles in the device, so it can be used with a Linux machine after it is configured with the Azeron software. I've heard of folks using AntiMicroX on Linux to configure it, but have never tried myself.

If you're OK with stepping away from a standard keyboard, I have an Azeron Cyborg that I use for most of my games. Paired with reWASD, it is infinitely customizable. It's a bit pricey, but I love having a thumbstick in the mix. Not quite what you're looking for, but maybe it provides some inspiration?

The key is stored in IndexedDB. You can read more about that at https://developer.chrome.com/docs/devtools/storage/indexeddb.

It's not readily available from the Terminal.app UI, but you can get there. Press Ctrl+Shift+I to open the Inspector. Select Application from the top tabs. On the left, under Storage, go to IndexedDB > indexeddb-fs > nassh-rootfs > directory. Look through the list of fullPath entries to find the appropriate entity. In the Value column, locate the data property and click the memory inspector icon to the right of it.

I use Chrome Remote Desktop daily. I don't know if it's the best, but it works great for me. https://remotedesktop.google.com/

ChromeOS Flex is an interesting choice for kiosks. There's a great case study from Nordic Choice Hotels: https://cloud.google.com/blog/products/chrome-enterprise/nordic-choice-hotels-bounces-back-ransomware-attack-chromeos-flex.

AsciiDoc for plain text markup. It handles more use cases, and has fewer ambiguities in the standard than Markdown.

On my main workstation I use Kitty, but everywhere else I use the Chrome Secure Shell Extension.

It hasn't been updated in 10 years, but still my go-to: https://play.google.com/store/apps/details?id=net.cactii.mathdoku