Installation and server related problems

Hello, sorry but one thing is not clear to me.
I want to install H5P on my LMS, but it is not in the list I find here: https://h5p.org/installation
Does H5P have any exchange API? Can I use these?

Thanks!
Max

I have spent over 7 hours trying to understand the instructions in this post in order to add an image button to the WYSIWYG editor in the 'Task description' field for all activity modules. I would love to assist in improving the documentation on this post by creating a video tutorial for the benefit of the community, once I understand the correct steps.

Hello, all! I'm hoping there is a genius amongst us that can help me out for some work I'm currently doing with my company. :)

We are currently developing some e-learning courses in Rise 360 and have built our own h5p content (content type: course presentation, heavily customised with out branding) . We would like to use the h5p content we have made which is currently hosted on our company website (wordpress, h5p plugin), on our Rise 360 courses.