If you are looking for a font similar to Krungthep, the closest match is Chicago, as the Latin characters in Krungthep were actually modeled after it. Krungthep is a Thai system font included with macOS, but its heavy, sans-serif, and slightly rounded Latin letterforms are iconic to Apple's early branding. Here are the best alternatives and similar styles: Direct Alternatives
Cocogoose Pro: A heavy, geometric display font. It is much more "blocky" and impactful, making it a great choice if you specifically like the thick, rectangular nature of Krungthep. font similar to krungthep
to upload an image of Krungthep and receive a list of commercially available matches. specifically for a platform like Google Fonts If you are looking for a font similar