It’s odd that many of the social media tasks sims can perform are exclusive to computers, as nowadays many people live entirely on their phones and there’s not a lot you need a computer to do. A.deep.indigo created this tweak that adds more social media choices to the phone, like it should have been in the first place! To use this mod you will need to download the Shared Library file (linked in the post), but they have several other great mods available so it’s worth it.