Most any country with the time will require proof of funds for residence. Tourists, not so much. Usually you hear this complaint from first time expats.
true about with property - was advised by two banks not to use Wise for real estate purchase due to concerns of showing clearly the money was coming offshore.
Do a small transfer and take your bank paperwork to immigration and ask “is this entered correctly - I will do remaining balance the same way”? And bring a Thai person with you. Or just do the transfer the best way you have available already. But if worried - do a test.