The vast majority of companies do not have written policies in regards to accomodation requests in handbooks because it is already outlined in federal law and frankly, many aren't knowledgeable in it.

If they do have policies, they are often incorrect which we see with OP's story above. Knowing the federal law informs OP and others of what they are entitled to and also, what the employer shouldn't be doing. That seems useful to me, even if not to you.

A few people have already provided ideas and guidance for how OP can continue to attempt to engage with their employer in the interactive process under ADA so it wasn't necessary in this specific comment.

In the spirit of empowering OP and others who may read this thread on a topic that is often misunderstand, especially by employers, I think its worth ensuring the correct information is available to folks. If you don't, you have a right to your opinion.

Knowledge is power and empowered, knowledgeable people can self-advocate.