Yes and no. Dani Alves certainly did on the right, but the left back (Abidal, Maxwell, Sylvinho, Adriano etc.) was usually a lot more conservative. Abidal played 10 games more than Zinchenko in the league that season and also finished with zero assists (Dani Alves had 15(!) just in La Liga that season)
Bayern's fullbacks didn't really contribute that many assists either (Rafinha, Kimmich, Bernat and Lahm had 7 between them in Pep's last season, compared to 5 between Cancelo, Walker, Zinchenko and Mendy for us this season)
I know assists aren't the only metric when it comes to affecting the play, and I am certainly in favour of signing a more dynamic left back to give us another option, but just wanted to point out that Pep has used fullbacks to create back threes in possession or as additional central midfielders a lot more than he has used them as a full-on attacking outlet