You could use Cloudflare R2 if you already are on Cloudflare.
Edit: I'm an idiot, you work for Cloudflare, lol - I thought you were just particularly sharp-eyed
I'm just imagining what would happen when would also provide managed Postgres in the same easy to handle and affordable manner as their other services.
Customisability is AWS/GCP's strong suit, but as a corollary they don't make it nearly as easy to 'paint within the lines' - which is an odd UX stance to take when, by definition, 99% of your customers fall within the 99%. Personally I would have designed it to be 'simple by default, configurable if you need it', but far be it from me to say what's best.