@woozle Thanks for engaging and trying to help here. Very much appreciated: Responding to your suggestions, here are some screenshots showing how things are set up and the current result from trying...

I have the same issue as discussed in this closed thread: https://community.tp-link.com/en/home/forum/topic/659462? This is a brand-new Archer BE230, just installed and replacing a Linksys WRT1900ACS...