I found a great reference for possibly adding switch functions where you'd like to (under the radio in the center stack). Let me know if this helps:
https://www.findlayautoparts.com/v-2020-chevrolet-silverado-1500--rst--5-3l-v8-gas/body--switches
I want to add the RC 10" mini LED's in my grille, and possibly a dual mode exhaust (more on that if it progresses) and I too want a factory look (no weird/non OE looking hardware) so I think this may be where I start to look.