I was wondering how do people get that support button on YouTube, I know it is only available for some countries but I have seen people outside them countries who have it. Also is there any other way people can donate to my channel if they wanted to?
That option isn't available in Freedom unfortunately. You can use things like Patreon https://www.patreon.com/ or just paypal and just leave the links on your video/channel pages where people can donate.