Can I submit my business registration card and portfolio instead of an employment contract for my Thailand dtvisa application?

Hello, I applied for Thailand dtvisa in Ho Chi Minh City I applied for a remote workstation, but today I received an email asking me to submit additional paperwork. The additional paperwork says to add a remote working employment contract, but I am the representative of a private transport and logistics business in Korea. Therefore, there is no remote employment contract. Transportation and logistics are handled by our staff and we look at the guidelines and taxes. We also work remotely in Korea. No need to go to the office. Can I just submit my business registration card and portfolio explaining this without an employment contract?