Just to add my experience to the instant-v-next day discussion:
My wife and I each have Wise accounts.
My UK occupational pension is paid directly into my Wise account.
My UK state pension is paid directly into my wife's Wise account.
Any transfer from my Wise account to our joint BKK bank, regardless of the amount or option chosen, is received the next working day at 2.00pm local time (or a few minutes after).
Any transfer from my wife's Wise account, regardless of the amount or option chosen, is received almost instantly into the same Joint BKK account.
We have tried many variations of amount and "reason for payment" but all my transfers are received next working day, and all my wife's are received almost instantly.
Some years ago I asked Wise to "tag" my account so that all my transfers would be shown as International (I use the monthly income for my extensions of stay). I can only conclude that this is the reason for the difference.