A few weeks ago I purchase a Keychron 10-G3 keyboard, because I wanted a wireless mechanical keyboard that did not break the bank.
And there was one problem...no pause/break key. For most people this is a non-issue and if you program this is a deal breaker.
This morning I figured out a solution...Microsoft PowerToys is a collection of very useful utilities one of which is called Keyboard Manager. Keyboard Manager enables you to remap a single key or remap a shortcut (collection of keys). Using Keyboard Manager I was able to map pause/break to Ctrl + Alt + Down.