I have set up an AWS architecture where:

1. AWS Lambda generates a presigned URL for an S3 bucket.

2. The Lambda function is connected to AWS AppSync, which returns the presigned URL to the client.

3. I can successfully download files using the generated presigned URL.

Now, my question is:

• Can I use the generated presigned URL to upload an image (or any file) directly to S3?

• If yes, how can I upload the file using the presigned URL in the APPSYNC is that possible to upload through APPSYNC

I want to confirm if the presigned URL allows both download and upload operations when generated via AppSync.

Any guidance or examples would be greatly appreciated!