Here are some useful example configs of mine : BATADV (mesh) the best decision? - #8 by Catfriend1
For the second "only wireless AP" I'd also recommend [HowTo/batman-adv] Bring AP SSIDs down if mesh backhaul gets disconnected
You're lucky, for the Archer I've made an image inluding batman-adv : State of TP-Link Archer C7v2|v5 in 2021