Regarding R2 signature cookie support and IP restrictions on signature URLs

We are currently considering migrating from AWS S3 to R2.
In S3, buckets are kept private and each file is distributed using a signature cookie.

First of all, does R2 support distribution using signature cookies?
Also, if it is not supported, do you have any plans to do so in the future?

Next, let’s talk about the signature URL.
I am planning to use R2 with the PHP AWS library, but when creating a signature URL, how can I configure it to allow access only from a specific IP address?

Thank you for your support.