Thanks for mentioning me.
This looks like a cool initiative. An oversight of all photography communities can be very helpful for photographers. Although I do miss a couple of big communities like Photograpy and Photography lovers. But I see it is a first version of the site and that there is work in progress.
Is it going to be a website that collects the contests with links to other front-ends or are you going to make it a front-end too?
I'll keep an eye on this project.

You might want to check out the Hive Photographers Discord Channel (https://discord.gg/dMep2wsKjc). Although it isn't very active at the moment, there are quite a few Hive photographers in there. Feel free to promote your site there.