yes tplink needs to Delpy DNS-over-HTTPS/3 across deco & tplink lines yes it more secure with the quic feature build into http/3 you have 3 lines encrypted better perforce

no worries just trying to help the deco units do appear work well

who dns are you using try cloudflare 1,1,1,2 & googledns 8.8.8.8 on deco or tplink or anyones router you should be stable private & fast unless your isp is having issues of there own

doh support across tplink & deco lines

full deployment of Doh over dns & doq quic over dns acroos the tplink & deco lines

bx600 tplink ax1800 it worked excellant for 2 days keep going offline lost of connection yes i was using mesh mode i had do reset during the first setup then it seen the mesh mode in my tplink ax73 v1