YOU SAID:
Watching Netflix, wanna join?
INTO JAPANESE
Netflix を観ていますが、参加しませんか?
BACK INTO ENGLISH
I'm watching Netflix, would you like to join in?
INTO JAPANESE
Netflixを見ているのですが、参加しませんか?
BACK INTO ENGLISH
I'm watching Netflix, would you like to join in?
That didn't even make that much sense in English.