WWE announced the following on their official website:
WWE Digital has learned that Bayley sustained an injury while training for her WWE Money in the Bank match against Bianca Belair and will be out approximately nine months.
A suitable replacement for the SmackDown Women’s Title Match will be announced tonight on FOX.
Tune in to SmackDown at 8/7 C and follow WWE social channels for the latest updates.
Bayley was set to face Belair in an “I Quit” match at the PPV.
BREAKING NEWS: @itsBayleyWWE has suffered an injury while training and will be out approximately nine months.— WWE (@WWE) July 9, 2021
A replacement for her match against @BiancaBelairWWE at #MITB will be announced tonight on #SmackDown.https://t.co/qLsf8KTHNp