nostr:npub1934g8ptfhf4855r8k8wt7numr5pj27xzwv89dkndn54c4kev94xq0y0q04 I use an Ergodox. My F keys are the number row after pressing a momentary lay key, I acn get upto F24. Same thing with arrow keys but there is a toggle I can leave on if I'm playing an RTS. Numpad is the right half of the keyboard with either a hold down layer with my left hand or a toggle key on thr right half.
It's also helped me with FPS games as I can change number row 1-5 into 6-0 with a quick momentary key. Doom Eternal was a lot of fun to weapon switch like a boss.