In short, it depends.
It depends on the type of screen reader that the person is using.
But let us first explain what is going on there.
Linkedin uses the Unicode standard for text encoding, representation, and handling. This is the most used standard in the world, and it supports most languages.
For a long time, assertive technologies such as screen readers couldn't read the formatted Unicode text, and visually impaired people couldn't understand what was written behind different bold or italic formats.
New screen readers and accessibility tools are finally implementing the procedures to read formatted Unicode text. Two of the three most used chrome extensions for screen reading read formatted content perfectly.
For example, Read Aloud: A Text to Speech Voice Reader has 4 million users, and it is perfect for reading formatted text.
However, some screen readers (especially desktop apps) still cannot read formatted content.
On our side, we cannot do anything when it comes to the readability of the Linkedin feed.
However, what we can do is implement the best practices to make our tool accessible to all users (so users that have any type of screen reader can use AuthoredIn to write their posts). And these practices are already in place.