With r17842-b428f187f0-20211024 I have clients connected to both 2.4 and 5 GHz networks, with the default ath10k-ct wifi driver.
I haven't really looked into the mainline ath10k.
Ps. you might highlight that upstream patch to @hauke who just merged the newest batch of the upstream mac80211 wifi backports. As the fix was apparently accepted by upstream, the fix will trickle down to us at some point.