How to assign SharePoint Online Document ID (_dlc_DocIdUrl)

Question

I have Document ID Service enabled in my SPO site.

1- Is it possible to specify a custom Document ID when uploading a document using the Graph API?

2- If not, is it possible to overwrite the Document ID after uploading the document?

3- If not possible either, how do I assign a Document ID using CSOM or REST?

For example, I tried the following without success (I get: Forbidden - Field '_dlc_DocIdUrl' is read-only):

var guid = Guid.NewGuid().ToString();

var listItem = new ListItem
{
    Fields = new FieldValueSet
    {
        AdditionalData = new Dictionary<string, object>()
        {
            { "_dlc_DocIdUrl", $"https://some_domain.sharepoint.com/_layouts/15/DocIdRedir.aspx?ID={guid}&{parentPath}" }
        }
    }
};

await graphServiceClient.Sites[siteId].Lists[listId].Items[itemId]
    .Request()
    .UpdateAsync(listItem);

PS: I also tried manually editing the Document ID directly in SPO and was not able to. Other fields show as editable, but Document ID seems to be read-only.