Read this, and note, as of November 2024
https://en.m.wikipedia.org/wiki/Cannabis_in_Thailand
Unless you can show the legislation then you are only, as I am, posting published opinions.
Here is some more reading, please, if you find something to counter it, then provide a link.
https://cms.law/en/int/expert-guides/cms-expert-guide-to-a-legal-roadmap-to-cannabis/thailand