You are right, re-reading the OPs post, it is not clear where they are located just that they work remotely. I a inferred more from that than was said.
Everyone is working everywhere around the globe in the company I used to work for. 100 people.
But the question is are you in the US or not? If you are in the US, the ADA may apply, if not, as a non-US citizen, it does not apply to you. There may be other laws that do apply, probably based on the contract or state the company is based in.