Was the file "TinyRTSGDNative.wasm" added to the project, or was it generated by the engine? If it was added, the file will have to be manually added when the game is exported.
When exporting the game (by going to the editor and selecting Project -> Export..., then selecting the export preset), a file can be added to the game package. In the Export dialog, click on the Resources tab and then enter the file that needs to be exported. In this case, it would be "TinyRTSGDNative.wasm" (without the quotes).
That should export the game along with the desired file. If entering just the file name doesn't work, it may also need the path to the file, i.e.