How Can I Turn a Keyboard Into a Macro Keyboard?

[tiffle]

It’s best to always search the forum to see if your question has already been asked. So have a look here:

How To Turn A Secondary Keyboard Into A Macro Keypad?

So what I'd like to do is basically use a second mac keyboard and use it exclusively as a macro keypad. So for example, I'd press the 'a' button on the secondary keyboard, and it'd trigger some combination like ctrl + shift + f without it actually printing the 'a' key. P.S. I understand that Karabiner Elements can provide this kind of functionality, however there's a really bad bug for M1 macs which prevents sleep functionality, so I'm looking for alternate ways of going about this.