Back in the day, the absolute best way (besides a personal contact) to get support for Stripe was via #stripe on Freenode where bunch of the devs hanged out.
If anyone who answered there is here, thank you for that unofficial but speediest support channel!
With the way Cloudflare works I'd say R2 is still a relatively young product and hasn't been heavily battle tested.
There are a lot of stable and working products.
And to support, well don't depend on it! If it works it works.