What additional documents are required for a 5-year workcation visa application in Thailand, including a project plan?

Hi everyone,

Would love to get your help on the below, and if you ever come up with that request. I submitted my documents to the Belgian embassy with the digital normal workcation (I have a permanent contract here that lets me work from anywhere), and 3 days late,r they came back with the following request for additional documents:

Higher res photo - did you scan or maybe take a picture of your passport-sized photo with your phone? I scanned it to ensure it looks better, but I guess not suitable

2.Other request documents: Since application would get 5 years-visa, please provide the letter of explanation of your plan/ project for the next 5 years in Thailand

Have you ever needed to submit project plan like this - not sure what plan they expect, that maybe I want to take language and cooking courses, perhaps at my own pace and understand the culture better?

Thanks in advance for your help!