How to to appear offline completely from Facebook on iPhone?

I already turned off my "online" option for messenger but I don't want certain people to know I've been online at all browsing through my newsfeed, liking posts etc. And it show what time I liked a post or shared something. Is there a way to stop Facebook from showing a time I like/share anything on Facebook from everyone or certain people using an iPhone? I read a different way online to go to friends and select "certain people" to keep from viewing that but my phone doesn't show that selection on the app or safari. Any help? No links if possible. If there's a simple instruction to do it that would help out the most.

Thats Not Possible You Can Appear Offline For Chat But If You Like Or Comment On Posts Your Friends Can Still See That From There News Feed

The Only Thing You Can Do Is If You Have A Specific Friend That You Don't Want To See What Your Doing On Your News Feed is Add Them To The Restricted List You Can Find That In Settings Under Blocking