I think what you’re looking for already exists, in the site setting top_menu you can add posted which will add a pill called ‘My Posts’ which shows all the topics you have created, replied to or followed.
Edit: Dax just beat me to it 
I think what you’re looking for already exists, in the site setting top_menu you can add posted which will add a pill called ‘My Posts’ which shows all the topics you have created, replied to or followed.
Edit: Dax just beat me to it