Bayern Munich president Herbert Hainer has said the club will not tolerate the racist abuse aimed at Alphonso Davies and partner Jordyn Huitema.
PSG handed Lyon their first women's first division defeat in almost four years when Marie-Antoinette Katoto earned them a 1-0 home win.
Lyon reached the final of the Women's Champions League for the fifth-straight time on Wednesday with a 1-0 win over PSG.
Holders Lyon edged out Bayern Munich 2-1 in their UEFA Women's Champions League quarterfinal to set up an all-French clash in the semis against PSG.
Formiga will extend her professional career into a 27th season after signing a one-year contract extension with Paris Saint-Germain's women side.