for dns setup i make cloudflare primary & google secondary for doh am using cloudflare gateway i think both are evadible in bazil you may have some local providers in your area am not sure who there...

And google dns & cloudflare & adgurad all have DOH DOQ all are more secure faster would be a very great feature improvement to already stable & fast line for deco & tplink

i usuallly mix clouflare & google myself doh dns over https/3 new doq dns over quic both are good

yes I wanted this DOH SUPPORT across tplink deco all lines of tplink business & customer lines to improve secure & improved speed no matter who internet your on from fibre to old dsl

tplink deco are both very good routers yes DOH DOQ woud be very nice feature improved security improved speed

there recent firmware upgrade but no doh support as yet hope show up in the near future