Hi @Er Bo Guan ,
Currenlty there is no workaround for this.
As a supplement, after enabling anonymous authentication in IIS, we will not be able to access the site anonymously before configuring the anonymous access at the web application level and site level, so it will still protect your data.
Note: Microsoft is providing this information as a convenience to you. The sites are not controlled by Microsoft. Microsoft cannot make any representations regarding the quality, safety, or suitability of any software or information found there. Please make sure that you completely understand the risk before retrieving any suggestions from the above link.
If an Answer is helpful, please click "Accept Answer" and upvote it.
Note: Please follow the steps in our documentation to enable e-mail notifications if you want to receive the related email notification for this thread.