RSS not working

Hi,
I set the RSS follow link as follows:
http://mydomain.com/feed
but it doesn’t even appear on the site (Facebook, Twitter, Linkedin and email icons are OK)

This feed configuration works with other plugins, but I would prefer to use Social Media Feather if this problem can be solved.

Thanks.

https://ww.wp.xz.cn/plugins/social-media-feather/