Once Wise has your money then the time for the transfer to THB is the same. I have read of people having issues with their UK bank stalling payments to Wise for some reason or other which caused delays, Every payment I ever made to my Wise account has been received within seconds, it goes as a "faster payment" from my UK bank.
Onward payments have normally arrived in seconds, in my case always within minutes. I have never used the mentioned notation which it is often said causes some delay. The payment time also seems to depend on the receiving bank, seems SCB, Kasikorn or Bangkok are the best and they also can receive larger payments (over 50kTHB I think).