breadcrumb format not displayed as expected

Hi, done the breadcrumb setting in Rank Math but the breadcrumb format displayed is not as expected. May you please advise? Thanks.
Expected:
Home/Category/Sub-Cat/Post
or
Home/Folder/Sub-folder/File

In the past (20 years ago…) when I made websites, I put html files into different folders and then FTP, and the breadcrumb and url simply show as home/folder/file name. I am new to wordpress and Rank Math nowadays. And I find that the html are automatically shown as website/year/month/.html but year & month folders are not found when I open my website via FTP.
Please kindly help and advise. Thanks.