Oh, how I wish. I have 3 Firewalla AP7s to get decent coverage through my house. Its lath and plaster walls may as well be lead lined. You could put a CT scanner in my living room and not notice a thing 2 rooms away.
Lath and plaster walls have a distressing tendency to be lined with chicken wire mesh which really damages your chances of any radio signal getting through.
I’ve strung CAT 6e from one end of the house to the other to link 2 of them. The 3rd’s in a place not amenable to cabling without way more effort than I’m up for, but it’s close enough to one of them that they mesh alright.
Pictures for anyone wondering what it looks like:
https://www.civilengineermag.com/chicken-mesh-for-plaster/
Wired wifi mesh or Ethernet all over would be my prescription. You basically have Faraday cages in every room right now!