I shall explain. I transfer or convert GBP to THB depending on the exchange rate. This makes no difference to Wise...they have your money wherever it came from.
Then you transfer to your Thai Bank, Bangkok and Kasikorn being Wises's main banks.
Put any reason you want, and unless you put Long Term Stay or Buying Property, it is usually immediate.
Otherwise it will arrive at 2pm the next day.
Proved beyond any doubt for several years.