I use Liberapay and have been pretty happy with it. Have found quite a few of the people and projects to which I would like to donate, but not all.

I use Runbox, and have for many years. Overall I’ve been happy with them. I think they have the features you are looking for.

I’m pretty sure it is not her personal responsibility to solve the climate crisis on the behalf of the rest of humanity. That would probably be best left to various subject matter experts, which I believe she has said many times.