I block the dingus laugh reactors, but this guy went out of his way to write a whole paragraph to not be helpful, so I needed to ask what he's doing here.
Ask your employer to write a document stating that you work for them and that you can work remotely from Thailand.
That's what it looks like. Every company makes it differently, but the information has to include your position and that you are able to work remotely.
All borders aren't closed, but taking a weekend trip to Kuala Lumpur, Phnom Penh or Da Nang was always a better option. Tickets are cheap and you get to travel instead of sitting in a van for a full day.
Try to upload Cover letter, typed and signed by a family member who sponsors the trip, and whose name on the above bank statement along with a signed photocopy of passport of the sponsor (that's you)