Hi @Anonymous ,
Do you want to create an app which connects Facebook, Twitter & LinkedIn connector?
Based on the needs that you mentioned, I think the PowerApps could achieve your needs. Firstly, you need to add Facebook, Twitter & LinkedIn as data source within your app.
Then within your app, you could defined four screens -- One Home screen and three social media platforms screen (each one for corresponding social media platform).
Within the Home screen, you could add three Navigate buttons -- "Facebook Media PlatForm", "Twitter Media PlatForm" and "LinkedIn Media PlatForm".
Set the OnSelect property of the three Navigate buttons to following formula individually:
"Facebook Media PlatForm".OnSelect:
Navigate(FacebookMediaPlatFormScreen)
"Twitter Media PlatForm".OnSelect:
Navigate(TwitterMediaPlatFormScreen)
"LinkedIn Media PlatForm".OnSelect:
Navigate(LinkedInMediaPlatFormScreen)
Within each Social Media Platform screen, you could add some Text Input boxes to collect users' enter data and a "Submit" button. When clicking the "Submit" button, you could consider fire a flow (Microsoft Fow), and pass related parameters to the flow, within the flow, you could add corresponding action to post data to corresponding social media platform.
Please check and see if the video resoures provided by @Daniel Christian could achieve your needs:
https://www.youtube.com/watch?v=SchOOYtGRXg
https://www.youtube.com/watch?v=y25I_2oeL1k
https://www.youtube.com/watch?v=Q3GpmXbtk2Q
https://www.youtube.com/watch?v=UqcqbOWHKoo
Best regards,