In a community-oriented forum, showing the user bio only in the avatar popover is not very intuitive for regular users. To improve visibility, I created this extension to display the user’s bio at the bottom of each post as a signature.
This extension reads the user bio provided by FriendsOfFlarum User Bio, so you need to install and enable the User Bio extension and set the bio content.
After installation, simply enable the extension to use it. If you need to customize the styles, you can modify .Post-signature yourself.
Preview:

Since my forum is still running on Flarum 1.8, this extension has not been tested on Flarum 2.0 yet.
Install
composer require damonhu/flarum-ext-biosignature:*
Update
composer update damonhu/flarum-ext-biosignature:*
php flarum cache:clear
php flarum assets:publish
GitHub
https://github.com/DamonHu/flarum-ext-biosignature