I do swift transfer from my bank in Sterling and get a good rate when it arrives at Bangkok Bank at least as good as wise and get the FTT prefix as was advised to me as necessary.
I wS told different, but anyway I do a Chaps International transfer direct from my bank each month and it costs a standard charge of £20 and for the amount I transfer it is much cheaper than any transfer company, on my bank book I get the correct prefix FTT.
I was told thar your transfer is best done direct from your home bank account into your Bangkok Bank account if donr though Wise it does not show on the account with the correct international transfer prefix.
It's quite a few years ago but we came on a AO visa 90 day and our Thai friend accompanied us to various banks and the K bank gave us a joint account, since then we have moved permanently here and to get the retirement visa had to get a Bangkok Bank account each, a joint account is nor recognised by immigration.