From a 2 second Google search and a nice agentic generative AI summary:
"According to recent data, Thailand welcomed approximately 35.5 million international tourists in 2024, marking a significant rebound from the pandemic lows, with the majority of visitors coming from the Asia-Pacific region followed by Europe; this figure is close to the pre-pandemic level of 39.8 million visitors in 2019."
So it's lower by 10% or so.