Can I get Apple TV on a non apple tv

Apple does not make TVs. You can access Apple TV using a Apple TV box, at tv.apple.com, or using a smart TV provided the Apple TV app is installed or available to install through the manufacturer.

Yes. I get it on my LG TV. I can also get it using a Roku. See: https://channelstore.roku.com/details/a20e3c294993147c6cda435497594031/apple-tv